[Blackfin] arch: add bfin_clear_PPIx_STATUS() helper funcs like we have for other parts

Signed-off-by: NMike Frysinger <vapier.adi@gmail.com>
Signed-off-by: NBryan Wu <cooloney@kernel.org>

include/asm-blackfin/mach-bf561/cdefBF561.h

@@ -559,6 +559,7 @@ static __inline__ void bfin_write_VR_CTL(unsigned int val)
 #define bfin_write_PPI0_CONTROL(val)         bfin_write16(PPI0_CONTROL,val)
 #define bfin_read_PPI0_STATUS()              bfin_read16(PPI0_STATUS)
 #define bfin_write_PPI0_STATUS(val)          bfin_write16(PPI0_STATUS,val)
+#define bfin_clear_PPI0_STATUS()             bfin_read_PPI0_STATUS()
 #define bfin_read_PPI0_COUNT()               bfin_read16(PPI0_COUNT)
 #define bfin_write_PPI0_COUNT(val)           bfin_write16(PPI0_COUNT,val)
 #define bfin_read_PPI0_DELAY()               bfin_read16(PPI0_DELAY)
@@ -570,6 +571,7 @@ static __inline__ void bfin_write_VR_CTL(unsigned int val)
 #define bfin_write_PPI1_CONTROL(val)         bfin_write16(PPI1_CONTROL,val)
 #define bfin_read_PPI1_STATUS()              bfin_read16(PPI1_STATUS)
 #define bfin_write_PPI1_STATUS(val)          bfin_write16(PPI1_STATUS,val)
+#define bfin_clear_PPI1_STATUS()             bfin_read_PPI1_STATUS()
 #define bfin_read_PPI1_COUNT()               bfin_read16(PPI1_COUNT)
 #define bfin_write_PPI1_COUNT(val)           bfin_write16(PPI1_COUNT,val)
 #define bfin_read_PPI1_DELAY()               bfin_read16(PPI1_DELAY)