GIC: Add API to set priority mask

API documentation updated.

Change-Id: I40feec1fe67a960d035061b54dd55610bc34ce1d
Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>
diff --git a/include/drivers/arm/gicv3.h b/include/drivers/arm/gicv3.h
index 09d6d80..95b6e3b 100644
--- a/include/drivers/arm/gicv3.h
+++ b/include/drivers/arm/gicv3.h
@@ -389,6 +389,7 @@
 		u_register_t mpidr);
 void gicv3_set_interrupt_pending(unsigned int id, unsigned int proc_num);
 void gicv3_clear_interrupt_pending(unsigned int id, unsigned int proc_num);
+unsigned int gicv3_set_pmr(unsigned int mask);
 
 #endif /* __ASSEMBLY__ */
 #endif /* __GICV3_H__ */