modpost: drop unused command line switches

Drop modpost command line switches that are no longer used by
makefile.modpost, upon request from Sam Ravnborg <[email protected]>,
who wrote:

    modpost is not supposed to be used outside the kernel build. [...]
    I checked if there were any options supported by modpost that
    was not configurable in Makefile.modpost.
    And I could see that the -M and -K options in getopt() were leftovers.
    The code that used these option was dropped in:
    commit a877376 ("Kbuild: clear marker out of modpost")

    Could you add a patch that delete these on top of what you already have.

https://lore.kernel.org/lkml/[email protected]/

Suggested-by: Sam Ravnborg <[email protected]>
Signed-off-by: Paul Walmsley <[email protected]>
Signed-off-by: Paul Walmsley <[email protected]>
Acked-by: Sam Ravnborg <[email protected]>
Signed-off-by: Masahiro Yamada <[email protected]>

Author: paul-walmsley-sifive

scripts/mod/modpost.c

@@ -2418,7 +2418,7 @@ int main(int argc, char **argv)
 	struct ext_sym_list *extsym_iter;
 	struct ext_sym_list *extsym_start = NULL;
 
-	while ((opt = getopt(argc, argv, "i:I:e:mnsST:o:awM:K:E")) != -1) {
+	while ((opt = getopt(argc, argv, "i:I:e:mnsST:o:awE")) != -1) {
 		switch (opt) {
 		case 'i':
 			kernel_read = optarg;