davinci: move psc support board-->cpu

Move DaVinci PSC support from board/* to cpu/* where it belongs.
The PSC module manages clocks and resets for all DaVinci-family
SoCs, and isn't at all board-specific.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
diff --git a/board/davinci/common/Makefile b/board/davinci/common/Makefile
index 127bb6e..8d9ea00 100644
--- a/board/davinci/common/Makefile
+++ b/board/davinci/common/Makefile
@@ -29,7 +29,7 @@
 
 LIB	= $(obj)lib$(VENDOR).a
 
-COBJS	:= psc.o misc.o
+COBJS	:= misc.o
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(COBJS))