OMAP: omap-mcbsp: Holding min latency constraint

Holding min latency constraint to reduce mp3 playback current.
Deeper states MPU RET/OFF is overhead and consume more power than savings.

Change-Id: Ia69e4ed8a52961e3e2007efbd03d67251066ff4e
Signed-off-by: Raviraj N. Somnache <x0172606@ti.com>
omapdss: remove warnings in gamma code
OMAP4430/60: EMIF: errata i743: Prohibit usage of Power-Down mode

A ZQ calibration long command is issued every time on exit
from active power-down and precharge power-down modes
when EMIF is configured to use Power-down mode
(EMIF_PWR_MGMT_CTRL.REG_LP_MODE=0x4).

Due to very short periods of power-down cycles, ZQ calibration
overhead creates bandwidth issues and increases overall system
power consumption.

As result, the guideline is to not allow Power-down mode and,
therefore, to not have set the
EMIF_PWR_MGMT_CTRL[10:8] REG_LP_MODE bit field to 0x4.

TI Errata i743; IMPACTED: OMAP4430/60 all revisions

Change-Id: Ib82f28e6e0c6c046ea277b90a78dc82c1ee82417
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Vitaly Chernooky <vitaly.chernooky@ti.com>
Signed-off-by: Willi Ye <williye97@gmail.com>

Conflicts:
	arch/arm/mach-omap2/emif.c
Enable Hard Float compilation

Signed-off-by: Willi Ye <williye97@gmail.com>

Conflicts:
	arch/arm/Makefile