mfd: Fix return type of lm533 attribute is_visible
mfd: Fix return type of lm533 attribute is_visible

Since commit 587a1f1659 ("switch ->is_visible() to returning umode_t")
the return type of is_visible is umode_t rather than mode_t.

This silences a compiler warning on some architectures where these types
are not compatible.

Reported-by: Andrew Morton <5c1e68b099950c134891f0b6e179498a8ebe9cf9@linux-foundation.org>
Signed-off-by: Johan Hovold <6a430eed381e126d51a8cce8db662f765ce314bc@gmail.com>
Signed-off-by: Samuel Ortiz <0ba86cb3f08bbb861958e54bd3438887adb4263c@linux.intel.com>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas