powerpc: mpc85xx: Move CONFIG_SYS_NUM_TLBCAMS to Kconfig

Use Kconfig option for SYS_NUM_TLBCAMS and clean up existing macros.

Signed-off-by: York Sun <york.sun@nxp.com>
diff --git a/arch/powerpc/cpu/mpc85xx/Kconfig b/arch/powerpc/cpu/mpc85xx/Kconfig
index 6d8709e..2b1d0f6 100644
--- a/arch/powerpc/cpu/mpc85xx/Kconfig
+++ b/arch/powerpc/cpu/mpc85xx/Kconfig
@@ -647,6 +647,14 @@
 		Number of local access windows. This is fixed per SoC.
 		If not sure, do not change.
 
+config SYS_NUM_TLBCAMS
+	int "Number of TLB CAM entries"
+	default 64 if E500MC
+	default 16
+	help
+		Number of TLB CAM entries for Book-E chips. 64 for E500MC,
+		16 for other E500 SoCs.
+
 source "board/freescale/b4860qds/Kconfig"
 source "board/freescale/bsc9131rdb/Kconfig"
 source "board/freescale/bsc9132qds/Kconfig"