kselftest/arm64: mte: Use the correct naming for tag check modes in check_hugetlb_opt...

kselftest/arm64: mte: Use the correct naming for tag check modes in check_hugetlb_options.c

The architecture doesn't define precise/imprecise MTE tag check modes,
only synchronous and asynchronous. Use the correct naming and also
ensure they match the MTE_{ASYNC,SYNC}_ERR type.

Fixes: 27879e8cb6b0 ("selftests: arm64: add hugetlb mte tests")
Cc: Yang Shi <yang@os.amperecomputing.com>
Reviewed-by: Yang Shi <yang@os.amperecomputing.com>
Link: https://lore.kernel.org/r/20250221093331.2184245-2-catalin.marinas@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>