Convert CONFIG_SYS_BR0_PRELIM et al to Kconfig

This converts the following to Kconfig:
   CONFIG_SYS_BR0_PRELIM
   CONFIG_SYS_OR1_PRELIM
   CONFIG_SYS_BR1_PRELIM
   CONFIG_SYS_OR2_PRELIM
   CONFIG_SYS_BR2_PRELIM
   CONFIG_SYS_OR2_PRELIM
   CONFIG_SYS_BR3_PRELIM
   CONFIG_SYS_OR3_PRELIM
   CONFIG_SYS_BR4_PRELIM
   CONFIG_SYS_OR4_PRELIM
   CONFIG_SYS_BR5_PRELIM
   CONFIG_SYS_OR5_PRELIM
   CONFIG_SYS_BR6_PRELIM
   CONFIG_SYS_OR6_PRELIM
   CONFIG_SYS_BR7_PRELIM
   CONFIG_SYS_OR7_PRELIM

This also introduces CONFIG_SYS_BR0_PRELIM_BOOL as not all platforms
that can set these values do so.  Add the relevant SYS_BRx_PRELIM_BOOL
to platforms that had not been previously migrated.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/P1020RDB-PD_defconfig b/configs/P1020RDB-PD_defconfig
index 3ee6bfc..34b2940 100644
--- a/configs/P1020RDB-PD_defconfig
+++ b/configs/P1020RDB-PD_defconfig
@@ -41,6 +41,15 @@
 CONFIG_ENV_ADDR=0xEFF20000
 CONFIG_DM=y
 CONFIG_DDR_CLK_FREQ=66666666
+CONFIG_SYS_BR0_PRELIM_BOOL=y
+CONFIG_SYS_BR0_PRELIM=0xEC001001
+CONFIG_SYS_OR0_PRELIM=0xFC000FF7
+CONFIG_SYS_BR2_PRELIM_BOOL=y
+CONFIG_SYS_BR2_PRELIM=0xFFB00801
+CONFIG_SYS_OR2_PRELIM=0xFFFE09FF
+CONFIG_SYS_BR3_PRELIM_BOOL=y
+CONFIG_SYS_BR3_PRELIM=0xFFA00801
+CONFIG_SYS_OR3_PRELIM=0xFFF009F7
 CONFIG_DM_I2C=y
 CONFIG_SPL_SYS_I2C_LEGACY=y
 CONFIG_I2C_SET_DEFAULT_BUS_NUM=y