mfd: da903x: Remove MODULE_LICENSE in non-modules

Since commit 8b41fc44 ("kbuild: create modules.builtin without
Makefile.modbuiltin or tristate.conf"), MODULE_LICENSE declarations
are used to identify modules. As a consequence, uses of the macro
in non-modules will cause modprobe to misidentify their containing
object file as a module when it is not (false positives), and modprobe
might succeed rather than failing with a suitable error message.

So remove it in the files in this commit, none of which can be built as
modules.
Signed-off-by: Nick Alcock <nick.alcock@oracle.com>
Suggested-by: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20230308194307.374789-1-nick.alcock@oracle.com

drivers/mfd/da903x.c

@@ -563,4 +563,3 @@ module_exit(da903x_exit);
 MODULE_DESCRIPTION("PMIC Driver for Dialog Semiconductor DA9034");
 MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>");
 MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
-MODULE_LICENSE("GPL v2");