perf/amd/ibs: Remove IBS_{FETCH|OP}_CONFIG_MASK macros

Definition of these macros are very simple and they are used at only one
place. Get rid of unnecessary redirection.

Signed-off-by: Ravi Bangoria <ravi.bangoria@amd.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/r/20250115054438.1021-2-ravi.bangoria@amd.com