Convert CONFIG_OMAP_EHCI_PHY1_RESET_GPIO et al to Kconfig

This converts the following to Kconfig:
   CONFIG_OMAP_EHCI_PHY1_RESET_GPIO
   CONFIG_OMAP_EHCI_PHY2_RESET_GPIO
   CONFIG_OMAP_EHCI_PHY3_RESET_GPIO

To do this, we also introduce CONFIG_HAS_CONFIG_OMAP_EHCI_PHYn_RESET_GPIO
options to get setting the GPIO number.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/omap35_logic_somlv_defconfig b/configs/omap35_logic_somlv_defconfig
index 4e31f77..9f3a88f 100644
--- a/configs/omap35_logic_somlv_defconfig
+++ b/configs/omap35_logic_somlv_defconfig
@@ -82,6 +82,8 @@
 CONFIG_USB=y
 # CONFIG_SPL_DM_USB is not set
 CONFIG_USB_EHCI_HCD=y
+CONFIG_HAS_OMAP_EHCI_PHY1_RESET_GPIO=y
+CONFIG_OMAP_EHCI_PHY1_RESET_GPIO=4
 CONFIG_USB_MUSB_HOST=y
 CONFIG_USB_MUSB_OMAP2PLUS=y
 CONFIG_TWL4030_USB=y