MAINTAINERS: Use wildcard pattern for ARM PMU headers

Looks like arm_pmuv3.h isn't caught by the ARM PMU maintainers entry.
Fix it with a wildcard.

Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Link: https://lore.kernel.org/r/20230915202421.2706446-1-oliver.upton@linux.dev
Signed-off-by: Will Deacon <will@kernel.org>

Author: oupton

MAINTAINERS

@@ -1662,7 +1662,7 @@ F:	arch/arm*/include/asm/perf_event.h
 F:	arch/arm*/kernel/hw_breakpoint.c
 F:	arch/arm*/kernel/perf_*
 F:	drivers/perf/
-F:	include/linux/perf/arm_pmu.h
+F:	include/linux/perf/arm_pmu*.h
 
 ARM PORT
 M:	Russell King <linux@armlinux.org.uk>