ARM: dts: msm: Increase register space to include all GPU registers

Increases the register space so we can read the GPU registers
past 0x10000 and dump those into the snapshot. Also fixes shader
memory size.

Change-Id: I2ed237d305a256824b9ce242773564d3624b83cb
Signed-off-by: Shrenuj Bansal <shrenujb@codeaurora.org>