Linux 6.9: Fix UBSAN errors in zap_micro.c

You can use the UBSAN_SANITIZE_* Kbuild options to exclude certain
kernel objects from the UBSAN checks.  We previously excluded
zap_micro.o with:

UBSAN_SANITIZE_zap_micro.o := n

For some reason that didn't work for the 6.9 kernel, which wants us
to use:

UBSAN_SANITIZE_zfs/zap_micro.o := n

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tony Hutter <hutter2@llnl.gov>
Closes openzfs#16278
Closes openzfs#16330

module/Kbuild.in

@@ -491,6 +491,7 @@ zfs-$(CONFIG_PPC64) += $(addprefix zfs/,$(ZFS_OBJS_PPC_PPC64))
 UBSAN_SANITIZE_zap_leaf.o := n
 UBSAN_SANITIZE_zap_micro.o := n
 UBSAN_SANITIZE_sa.o := n
+UBSAN_SANITIZE_zfs/zap_micro.o := n
 
 # Suppress incorrect warnings from versions of objtool which are not
 # aware of x86 EVEX prefix instructions used for AVX512.