bf60x: pm: add pint suspend and resume support

save and restore pint sec CTL
save and restore pint registers
add pint suspend and resume when suspend to mem

Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
diff --git a/arch/blackfin/mach-common/pm.c b/arch/blackfin/mach-common/pm.c
index ca6655e..4878f36 100644
--- a/arch/blackfin/mach-common/pm.c
+++ b/arch/blackfin/mach-common/pm.c
@@ -172,6 +172,8 @@
 
 	bfin_gpio_pm_hibernate_suspend();
 
+	bfin_pint_suspend();
+
 #if defined(CONFIG_BFIN_EXTMEM_WRITEBACK) || defined(CONFIG_BFIN_L2_WRITEBACK)
 	flushinv_all_dcache();
 #endif
@@ -190,6 +192,8 @@
 	_enable_icplb();
 	_enable_dcplb();
 
+	bfin_pint_resume();
+
 	bfin_gpio_pm_hibernate_restore();
 	blackfin_dma_resume();