ARM: omap: tuna: add HSI support

Adds basic HSI support for tuna

Change-Id: I844297038d6a5e676a1ecfa83035c5d568ee342e
Signed-off-by: Vikram Pandita <vikram.pandita@ti.com>
misc: modem_if: Add modem interface driver

1. Update modem interface driver based on TI HSI patch.
	- TI HSI patch
	: Change I01715849: omap4: hsi driver initial commit
	: Change I14d257ae: ARM: omap: tuna: add HSI support
        : Change Icebb37db: omap4: enable hsi hwmod
        : Change Iec8eef73: tuna: defcoinfig: enable HSI
2. Checked Modem BootUp and MIPI communication working.

Change-Id: I75a2d960f3a66004fa81743fae931f04bd4f0c07
Signed-off-by: wonhee <wonhee48.seo@samsung.com>

Conflicts:
	drivers/misc/Kconfig

Conflicts:
	drivers/misc/Kconfig
ARM: omap4: tuna: Add board-tuna-modems.c

Change-Id: I67650ca73ee591bee684a33f1f227bfad9fa6423
Signed-off-by: wonhee <wonhee48.seo@samsung.com>

Conflicts:
	arch/arm/mach-omap2/Makefile
tuna: add wifi back

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

Conflicts:
	arch/arm/mach-omap2/control.c
	arch/arm/mach-omap2/control.h
	arch/arm/mach-omap2/hsmmc.h