Convert CONFIG_SMSC_LPC47M et al to Kconfig

This converts the following to Kconfig:
   CONFIG_SMSC_LPC47M
   CONFIG_SMSC_SIO1007

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 122d605..b07261d 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -112,6 +112,12 @@
 	  Enable support for reading and writing the eMemory OTP on the
 	  SiFive SoCs.
 
+config SMSC_LPC47M
+	bool "LPC47M SMSC driver"
+
+config SMSC_SIO1007
+	bool "SIO1007 SMSC driver"
+
 config VEXPRESS_CONFIG
 	bool "Enable support for Arm Versatile Express config bus"
 	depends on MISC