Convert CONFIG_83XX_PCICLK to Kconfig

This converts the following to Kconfig:
   CONFIG_83XX_PCICLK

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/kmtegr1_defconfig b/configs/kmtegr1_defconfig
index e2bf945..53aaf6c 100644
--- a/configs/kmtegr1_defconfig
+++ b/configs/kmtegr1_defconfig
@@ -118,6 +118,7 @@
 CONFIG_ACR_PARKM_USB_I2C1_BOOT=y
 CONFIG_LCRR_EADC_1=y
 CONFIG_LCRR_CLKDIV_2=y
+CONFIG_83XX_PCICLK=0x3ef1480
 CONFIG_SYS_LOAD_ADDR=0x100000
 CONFIG_OF_BOARD_SETUP=y
 CONFIG_OF_STDOUT_VIA_ALIAS=y