Linux 6.9: Fix UBSAN errors in sa.c (openzfs#16380)

This is a follow-on to 156a641
that ignores UBSAN errors in sa.c.

Thank you @thwalker3 for the fix.

Original-patch-by: @thwalker3
Signed-off-by: Tony Hutter <hutter2@llnl.gov>
Closes openzfs#16278
Closes openzfs#16330
Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>

module/Kbuild.in

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