phy: kona2: use 'select GENERIC_PHY' in Kconfig

All other phy drivers use 'select', while this one is
the only one to use 'depends on'. This is not a bug, just
slightly inconsistent, so let's change it to do things the
same way as everyone else.

We may also want to turn GENERIC_PHY into a silent option
that only ever gets turned on if another driver needs it.

Signed-off-by: Arnd Bergmann <[e-mail]>
Cc: Kishon Vijay Abraham I <[e-mail]>
Cc: Matt Porter <[e-mail]>
Cc: Felipe Balbi <[e-mail]>
Signed-off-by: Kishon Vijay Abraham I <[e-mail]>

drivers/phy/Kconfig

···
 
 config BCM_KONA_USB2_PHY
 	tristate "Broadcom Kona USB2 PHY Driver"
-	depends on GENERIC_PHY
 	depends on HAS_IOMEM
+	select GENERIC_PHY
 	help
 	  Enable this to support the Broadcom Kona USB 2.0 PHY.