arm64: mm: Re-implement the __tlbi_level macro as a C function

arm64: mm: Re-implement the __tlbi_level macro as a C function

As part of efforts to reduce our reliance on complex preprocessor macros
for TLB invalidation routines, convert the __tlbi_level macro to a C
function for by-level TLB invalidation.

Each specific tlbi level op is implemented as a C function and the
appropriate function pointer is passed to __tlbi_level(). Since
everything is declared inline and is statically resolvable, the compiler
will convert the indirect function call to a direct inline execution.

Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Signed-off-by: Ryan Roberts <ryan.roberts@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>