modpost: add missing else to the "of" check

Without this 'else' statement, an "usb" name goes into two handlers:
the first/previous 'if' statement _AND_ the for-loop over 'devtable',
but the latter is useless as it has no 'usb' device_id entry anyway.

Tested with allmodconfig before/after patch; no changes to *.mod.c:

git checkout v6.6-rc3
make -j$(nproc) allmodconfig
make -j$(nproc) olddefconfig

make -j$(nproc)
find . -name '*.mod.c' | cpio -pd /tmp/before

# apply patch

make -j$(nproc)
find . -name '*.mod.c' | cpio -pd /tmp/after

diff -r /tmp/before/ /tmp/after/
# no difference

Fixes: acbef7b76629 ("modpost: fix module autoloading for OF devices with generic compatible property")
Signed-off-by: Mauricio Faria de Oliveira <[e-mail]>
Signed-off-by: Masahiro Yamada <[e-mail]>

scripts/mod/file2alias.c

···
 	/* First handle the "special" cases */
 	if (sym_is(name, namelen, "usb"))
 		do_usb_table(symval, sym->st_size, mod);
-	if (sym_is(name, namelen, "of"))
+	else if (sym_is(name, namelen, "of"))
 		do_of_table(symval, sym->st_size, mod);
 	else if (sym_is(name, namelen, "pnp"))
 		do_pnp_device_entry(symval, sym->st_size, mod);