Convert CONFIG_SYS_DDR_RAW_TIMING to Kconfig

This converts the following to Kconfig:
   CONFIG_SYS_DDR_RAW_TIMING

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/P1010RDB-PB_NOR_defconfig b/configs/P1010RDB-PB_NOR_defconfig
index 5118e83..3d4fb2c 100644
--- a/configs/P1010RDB-PB_NOR_defconfig
+++ b/configs/P1010RDB-PB_NOR_defconfig
@@ -49,6 +49,7 @@
 CONFIG_DDR_CLK_FREQ=66666666
 CONFIG_SYS_SPD_BUS_NUM=1
 CONFIG_CHIP_SELECTS_PER_CTRL=1
+CONFIG_SYS_DDR_RAW_TIMING=y
 CONFIG_COMMON_INIT_DDR=y
 CONFIG_SPL_COMMON_INIT_DDR=y
 CONFIG_DM_I2C=y