binfmt_som.c: add MODULE_LICENSE

Add the missing MODULE_LICENSE("GPL").

Reported-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Cc: Matthew Wilcox <matthew@wil.cx>
Cc: Grant Grundler <grundler@parisc-linux.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/binfmt_som.c b/fs/binfmt_som.c
index 68be580..74e587a 100644
--- a/fs/binfmt_som.c
+++ b/fs/binfmt_som.c
@@ -306,3 +306,5 @@
 
 core_initcall(init_som_binfmt);
 module_exit(exit_som_binfmt);
+
+MODULE_LICENSE("GPL");