iommu/arm-smmu: Remove #define for non-existent PRIQ_0_OF field

PRIQ_0_OF has been removed from the SMMUv3 architecture, so remove its
corresponding (and unused) #define from the driver.
Signed-off-by: NWill Deacon <will.deacon@arm.com>

drivers/iommu/arm-smmu-v3.c

@@ -378,7 +378,6 @@
 #define PRIQ_0_SID_MASK			0xffffffffUL
 #define PRIQ_0_SSID_SHIFT		32
 #define PRIQ_0_SSID_MASK		0xfffffUL
-#define PRIQ_0_OF			(1UL << 57)
 #define PRIQ_0_PERM_PRIV		(1UL << 58)
 #define PRIQ_0_PERM_EXEC		(1UL << 59)
 #define PRIQ_0_PERM_READ		(1UL << 60)