Convert CONFIG_RESET_PHY_R to Kconfig

This converts the following to Kconfig:
   CONFIG_RESET_PHY_R

Cc: Ramon Fried <rfried.dev@gmail.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/net2big_v2_defconfig b/configs/net2big_v2_defconfig
index f55ca67..dddc129 100644
--- a/configs/net2big_v2_defconfig
+++ b/configs/net2big_v2_defconfig
@@ -24,6 +24,7 @@
 CONFIG_CONSOLE_MUX=y
 # CONFIG_DISPLAY_BOARDINFO is not set
 CONFIG_MISC_INIT_R=y
+CONFIG_RESET_PHY_R=y
 CONFIG_HUSH_PARSER=y
 CONFIG_SYS_PROMPT="2big2> "
 CONFIG_CMD_EEPROM=y