Convert CONFIG_88F5182 et al to Kconfig

This converts the following to Kconfig:
   CONFIG_88F5182
   CONFIG_BOARD_IS_OPENRD_BASE
   CONFIG_BOARD_IS_OPENRD_CLIENT
   CONFIG_BOARD_IS_OPENRD_ULTIMATE
   CONFIG_D2NET_V2
   CONFIG_FEROCEON
   CONFIG_FEROCEON_88FR131
   CONFIG_INETSPACE_V2
   CONFIG_KW88F6192
   CONFIG_KW88F6281
   CONFIG_KW88F6702
   CONFIG_NET2BIG_V2
   CONFIG_NETSPACE_LITE_V2
   CONFIG_NETSPACE_MAX_V2
   CONFIG_NETSPACE_MINI_V2
   CONFIG_NETSPACE_V2
   CONFIG_SHEEVA_88SV131

At this point mv-plug-common.h is now only an include of mv-common.h so
remove that indirection.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/net2big_v2_defconfig b/configs/net2big_v2_defconfig
index cc1d81c..083d3e6 100644
--- a/configs/net2big_v2_defconfig
+++ b/configs/net2big_v2_defconfig
@@ -6,6 +6,7 @@
 CONFIG_SYS_TEXT_BASE=0x600000
 CONFIG_NR_DRAM_BANKS=2
 CONFIG_TARGET_NET2BIG_V2=y
+CONFIG_NET2BIG_V2=y
 CONFIG_ENV_SIZE=0x1000
 CONFIG_ENV_OFFSET=0x70000
 CONFIG_ENV_SECT_SIZE=0x10000
@@ -13,7 +14,6 @@
 CONFIG_IDENT_STRING=" 2Big v2"
 # CONFIG_SYS_MALLOC_F is not set
 CONFIG_SYS_LOAD_ADDR=0x800000
-CONFIG_SYS_EXTRA_OPTIONS="NET2BIG_V2"
 CONFIG_BOOTDELAY=3
 CONFIG_USE_BOOTARGS=y
 CONFIG_BOOTARGS="console=ttyS0,115200"