Convert CONFIG_SYS_FSL_NUM_CC_PLLS to Kconfig

This converts the following to Kconfig:
   CONFIG_SYS_FSL_NUM_CC_PLLS

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/lx2160aqds_tfa_defconfig b/configs/lx2160aqds_tfa_defconfig
index 7fce30b..1d480e7 100644
--- a/configs/lx2160aqds_tfa_defconfig
+++ b/configs/lx2160aqds_tfa_defconfig
@@ -23,6 +23,7 @@
 CONFIG_VID_FLS_ENV="lx2160aqds_vdd_mv"
 CONFIG_VOL_MONITOR_LTC3882_READ=y
 CONFIG_VOL_MONITOR_LTC3882_SET=y
+CONFIG_SYS_FSL_NUM_CC_PLLS=4
 CONFIG_FSL_QIXIS=y
 CONFIG_REMAKE_ELF=y
 CONFIG_MP=y