[ARM] Restore cache information

[chaitu236]

Restore cache information for ARM targets on 6.18 kernel that was previously implemented in 4.14 with 111fd34 and 8bb1a5f which these commits replace.

ARM version of libniCPULib expects raw bytes instead of 32K, etc so add a compatibility commit.

WI: AB#3990506

Testing

• Built kernel and booted on cRIO-9068
• Ran following to validate that LV APIs work

import ctypes

path = "/usr/local/natinst/labview/libniCPULib.so.26.3.0"
lib = ctypes.CDLL(path)

lib.DataCacheSize.argtypes = [ctypes.c_uint]
lib.DataCacheSize.restype = ctypes.c_uint64

lib.DataCacheEntrySize.argtypes = [ctypes.c_uint]
lib.DataCacheEntrySize.restype = ctypes.c_uint

lib.DataCacheEntryType.argtypes = [ctypes.c_uint]
lib.DataCacheEntryType.restype = ctypes.c_uint

for level in range(5):
    print(
        level,
        "size=", lib.DataCacheSize(level),
        "entry_size=", lib.DataCacheEntrySize(level),
        "type=", lib.DataCacheEntryType(level),
    )