Revert "powerpc: ppc4xx: remove lwmon5 support"

This reverts commit 8fe11b8901a31d11990488c82bc23612589d57be.

I'll add support to lwmon5 in the next patch and will remove
support for the broken lcd4_lwmon5 as well.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/powerpc/cpu/ppc4xx/Kconfig b/arch/powerpc/cpu/ppc4xx/Kconfig
index 23ecc89..8d3ba8d 100644
--- a/arch/powerpc/cpu/ppc4xx/Kconfig
+++ b/arch/powerpc/cpu/ppc4xx/Kconfig
@@ -8,6 +8,10 @@
 	prompt "Target select"
 	optional
 
+config TARGET_LWMON5
+	bool "Support lwmon5"
+	select SUPPORT_SPL
+
 config TARGET_T3CORP
 	bool "Support t3corp"
 
@@ -165,6 +169,7 @@
 source "board/gdsys/dlvision/Kconfig"
 source "board/gdsys/gdppc440etx/Kconfig"
 source "board/gdsys/intip/Kconfig"
+source "board/lwmon5/Kconfig"
 source "board/mosaixtech/icon/Kconfig"
 source "board/mpl/mip405/Kconfig"
 source "board/mpl/pip405/Kconfig"