Blackfin arch: use HI/LO macros rather than masking the bit ranges ourselves

Signed-off-by: Mike Frysinger <michael.frysinger@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>

diff --git a/arch/blackfin/mach-common/cacheinit.S b/arch/blackfin/mach-common/cacheinit.S
index 05c0c77..afa0adf 100644
--- a/arch/blackfin/mach-common/cacheinit.S
+++ b/arch/blackfin/mach-common/cacheinit.S
@@ -43,8 +43,8 @@
 ENTRY(_bfin_write_IMEM_CONTROL)
 
 	/* Enable Instruction Cache */
-	P0.l = (IMEM_CONTROL & 0xFFFF);
-	P0.h = (IMEM_CONTROL >> 16);
+	P0.l = LO(IMEM_CONTROL);
+	P0.h = HI(IMEM_CONTROL);
 
 	/* Anomaly 05000125 */
 	CLI R1;