ar71xx: fix Kconfig dependency of the 88E6063 switch DSA driver

The Marvell 88E6063 ethernet switch driver depends on the DSA
framework. Add a 'depends on NET_DSA' statement to its Kconfig
entry to state that explicitly.

Fixes the following Kconfig warning:

  warning: (NET_DSA_MV88E6060 && NET_DSA_MV88E6063) selects NET_DSA_TAG_TRAILER which has unmet direct dependencies (NET && NET_DSA)

Signed-off-by: Gabor Juhos <juhosg@freemail.hu>

target/linux/ar71xx/patches-4.4/423-dsa-add-88e6063-driver.patch

@@ -1,11 +1,12 @@
 --- a/drivers/net/dsa/Kconfig
 +++ b/drivers/net/dsa/Kconfig
-@@ -13,6 +13,13 @@ config NET_DSA_MV88E6060
+@@ -13,6 +13,14 @@ config NET_DSA_MV88E6060
  	  This enables support for the Marvell 88E6060 ethernet switch
  	  chip.
  
 +config NET_DSA_MV88E6063
 +	bool "Marvell 88E6063 ethernet switch chip support"
++	depends on NET_DSA
 +	select NET_DSA_TAG_TRAILER
 +	---help---
 +	  This enables support for the Marvell 88E6063 ethernet switch

target/linux/ar71xx/patches-4.9/423-dsa-add-88e6063-driver.patch

@@ -1,11 +1,12 @@
 --- a/drivers/net/dsa/Kconfig
 +++ b/drivers/net/dsa/Kconfig
-@@ -9,6 +9,13 @@ config NET_DSA_MV88E6060
+@@ -9,6 +9,14 @@ config NET_DSA_MV88E6060
  	  This enables support for the Marvell 88E6060 ethernet switch
  	  chip.
  
 +config NET_DSA_MV88E6063
 +	bool "Marvell 88E6063 ethernet switch chip support"
++	depends on NET_DSA
 +	select NET_DSA_TAG_TRAILER
 +	---help---
 +	  This enables support for the Marvell 88E6063 ethernet switch