Revert "defconfig: Disable MultiROM support"

This reverts commit bd2860daacf1897f81d4ce9289ad3ceb735208fb.
msm: mdss: Allocate fb memory under 4GB physical address
 space

Linux kernel framework of framebuffer APIs do not support LPAE systems.
These APIs are using "unsigned long" data type instead of "phys_addr_t"
for physical addresses which doesn't work with LPAE systems. Until
framebuffer APIs are fixed, allocate fb memory on MSM chip-sets using
dma_alloc_coherent and GFP_KERNEL to get the memory from below 4GB
physical address space.

Signed-off-by: Ujwal Patel <ujwalp@codeaurora.org>
[neo: Conversion to dma_alloc_coherent of fb mem
 allocation was already done in commit cbcf51df1cc4f77937afe16f3750b79f4e94ed0c]
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>