[CORE] Rename vmm_host_physical_xxx() APIs to vmm_host_memory_xxx() APIs

The original vmm_host_physical_xxx() APIs were meant to access both RAM and Devices but memory flags required for accessing RAM different from memory flags required accessing Devices.

To simply the situation we only provide vmm_host_memory_xxx() APIs for accessing RAM only.

In other words, vmm_host_memory_xxx() APIs will assume that we are accessing RAM, DDR, SRAM, etc.

Further, vmm_host_memory_xxx() will do cacheable & bufferable access to underlying memory because it might happen that memory portion we are trying to access using this APIs is already in cache.

Signed-off-by: Anup Patel <anup@brainfault.org>