powerpc: P1022DS: Remove macro CONFIG_P1022DS

Use CONFIG_TARGET_P1022DS instead.

Signed-off-by: York Sun <york.sun@nxp.com>
diff --git a/board/freescale/common/Makefile b/board/freescale/common/Makefile
index 7e8587c..91374ac 100644
--- a/board/freescale/common/Makefile
+++ b/board/freescale/common/Makefile
@@ -51,7 +51,7 @@
 
 obj-$(CONFIG_TARGET_MPC8536DS)	+= ics307_clk.o
 obj-$(CONFIG_TARGET_MPC8572DS)	+= ics307_clk.o
-obj-$(CONFIG_P1022DS)		+= ics307_clk.o
+obj-$(CONFIG_TARGET_P1022DS)		+= ics307_clk.o
 obj-$(CONFIG_P2020DS)		+= ics307_clk.o
 obj-$(CONFIG_P3041DS)		+= ics307_clk.o
 obj-$(CONFIG_P4080DS)		+= ics307_clk.o