This reverts commit 6f0320a9535bc1aa81d83fa879ac14d5ee603658.

Change-Id: I7425d422a4a0af7a49e9194cfe0bb55d431bc401

This reverts commit 568b81202ebd24a3f7e9efe0558b5f6beed05b44.

Change-Id: I2af42cd53d0ce490bf96c68288e9fbde034c0069

Change-Id: Ic5d9de230efceabc2c428e5c78fa6596a5a34840

Allow user to select cpu undervolt

There have been quite a few issues across the SANSA AMS line related
to CPU undervolting while most players show greatly increased runtime
some crash.
Rather than constanly upping the voltage we now have a
setting with a safe value for all players and the option for lower voltages

I plan to add a few other options here later such as disk
timings and maybe some other clocks/experimental settings

Added: Disk Low speed option for AS3525v2 devices cuts
	frequency to 12 MHz from 24 MHz
Added: Disk Low speed option for AS3525v1 devices cuts
        frequency to 15.5 MHz from 31 MHz

Added: I2c Low Speed AS3525 devices, should be bigger improvement for v1 devices

Fixed: Debug menu for AS3525v2 No SDSLOT frequency,
	Showed IDE freq though it is unused

Added: DBOP and SSP underclocking affects display on v1/v2 respectively

Fixed: debug menu now has SSP frequency, and SSP_CPSR

Update: made settings menu more generic

Update: cleaned up code

Added: Clip v1 & Fuze v1 didn't have HAVE_ADJUSTABLE_CPU_VOLTAGE.
	not sure why but,  waiting on testing to confirm

Added: C200v2 and E200v2 devices and HAVE_ADJUSTABLE_CPU_VOLTAGE.

Fixed: v1 devices don't like display timing set lower (dbop)
       v1 devices don't have a divider set for ssp (causes divide by 0)

Fixed: ClipZip display lags with Max SSP divider changed from 0xFE to 0x32

Fixed: v1 devices didn't work properly with highspeed sd cards
	Added code from http://gerrit.rockbox.org/r/#/c/1704/
	Added powersave and IDE interface enable/disable

Added: V2 devices now have powersave enabled on sd interface

Update: cleaned up code, lang defines, added manual entries

Update ssp clock mechanism added calculated ssp divider to clipzip

Update turn display clock off when clip+ turns off display

Fixed: clipzip wrong register for SSP clock

Change-Id: I04137682243be92f0f8d8bf1cfa54fbb1965559b
TODO: add other players?

With this changes rockbox can be loaded from SD card when internal storage
can't be mount (due to hardware or software problem).

Change-Id: I32b20d3f341566364def747a708a54ba6b4a7f8b

Change-Id: Icddf1ea0a03f0426e0cf9b99f05ea065f532fed5

For some reason, the bootloader and config files didn't define
HAVE_BOOTLOADER_USB_MODE, also remove the special cases in usb.c which they
implied.

Change-Id: I68c29be7d03627e64cac4ff7678e0c211e087a8c

Except for unfinished or experimental ports, it isthe case that
USE_ROCKBOX_USB and HAVE_USBSTACK are both defined or both undefined.
Furthermore, it is a leftover of some early developments on the USB stack and
doesn't make sense anymore.

Change-Id: Ic87a865b6bb4c7c9a8d45d1f0bb0f2fb536b8cad
Reviewed-on: http://gerrit.rockbox.org/1091
Reviewed-by: Amaury Pouly <amaury.pouly@gmail.com>

DPI values are autogenerated from the resolution and collected display size
values. These values are inserted as comments as well.

Change-Id: Id03aedf9af18348f773dfce002805e480f6751e8

Also move the definition to config.h

Change-Id: I36bb5020c5e06b2344292bc05e8c13ccc7a6a1ff
Reviewed-on: http://gerrit.rockbox.org/234
Reviewed-by: Nils Wallménius <nils@rockbox.org>