MIPS: Kconfig: Delete duplicate definition of RWSEM_GENERIC_SPINLOCK.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/Kconfig

@@ -1966,10 +1966,6 @@ config SECCOMP
 
 endmenu
 
-config RWSEM_GENERIC_SPINLOCK
-	bool
-	default y
-
 config LOCKDEP_SUPPORT
 	bool
 	default y