kbuild: replace $(if A,A,B) with $(or A,B) in scripts/Makefile.modpost

Similar cleanup to commit 5c81664 ("kbuild: replace $(if A,A,B)
with $(or A,B)").

Signed-off-by: Masahiro Yamada <[email protected]>
Reviewed-by: Nick Desaulniers <[email protected]>

Author: masahir0y

scripts/Makefile.modpost

@@ -87,7 +87,7 @@ obj := $(KBUILD_EXTMOD)
 src := $(obj)
 
 # Include the module's Makefile to find KBUILD_EXTRA_SYMBOLS
-include $(if $(wildcard $(src)/Kbuild), $(src)/Kbuild, $(src)/Makefile)
+include $(or $(wildcard $(src)/Kbuild), $(src)/Makefile)
 
 # modpost option for external modules
 MODPOST += -e