The offset there is the virtual address space on the bus side (1-9GB for 8GB RAM),
and that emi_mpu_set_region_protection will translate to the physical memory space (0-8GB).

8GB is 33-bit (the memory bus width is 33-bit on this platform),
so 0x23FFFFFFFUL-EMI_PHY_OFFSET = 0x1_FFFF_FFFF.

Change-Id: I7be4759ed7546f7e15a5868b6f08988928c34075
Signed-off-by: Xi Chen <xixi.chen@mediatek.com>

Add EMI MPU driver for DRAM protection.

Signed-off-by: kenny liang <kenny.liang@mediatek.com>
Change-Id: I0355e084184b5396ad8ac99fff6ef9d050fb5e96