fix for toolchain GCC 4.7 Google
fix for toolchain GCC 4.6
added CPU voltage VDD control (thanks to @Faux123) ported to msm8974 platform
lowered MIN allowed voltage to 700mV
Update defconfig
usb: gadget: mass_storage: added sysfs entry for cdrom to LUNs

This patch adds a "cdrom" sysfs entry for each mass_storage LUN, just
like "ro" sysfs entry. This allows switching between USB and CD-ROM
emulation without reinserting the module or recompiling the kernel.

Change-Id: Idf83c74815b1ad370428ab9d3e5503d5f7bcd3b6
added overclock upto 2.5GHz
defconfig: Enable overclock
Update defconfig
added optimizations for compiling (thanks to @franciscofranco)