kbuild: clean up objtool_args slightly

The code:

  $(if $(or $(CONFIG_GCOV_KERNEL),$(CONFIG_LTO_CLANG)), ...)

... can be simpled to:

  $(if $(CONFIG_GCOV_KERNEL)$(CONFIG_LTO_CLANG), ...)

Also, remove meaningless commas at the end of $(if ...).
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

scripts/Makefile.lib

@@ -236,13 +236,12 @@ endif
 # then here to avoid duplication.
 objtool_args =								\
 	$(if $(CONFIG_UNWINDER_ORC),orc generate,check)			\
-	$(if $(part-of-module), --module,)				\
+	$(if $(part-of-module), --module)				\
 	$(if $(CONFIG_FRAME_POINTER),, --no-fp)				\
-	$(if $(or $(CONFIG_GCOV_KERNEL),$(CONFIG_LTO_CLANG)), 		\
-		--no-unreachable,)					\
-	$(if $(CONFIG_RETPOLINE), --retpoline,)				\
-	$(if $(CONFIG_X86_SMAP), --uaccess,)				\
-	$(if $(CONFIG_FTRACE_MCOUNT_USE_OBJTOOL), --mcount,)
+	$(if $(CONFIG_GCOV_KERNEL)$(CONFIG_LTO_CLANG), --no-unreachable)\
+	$(if $(CONFIG_RETPOLINE), --retpoline)				\
+	$(if $(CONFIG_X86_SMAP), --uaccess)				\
+	$(if $(CONFIG_FTRACE_MCOUNT_USE_OBJTOOL), --mcount)
 
 # Useful for describing the dependency of composite objects
 # Usage: