tegra: remove CONFIG_USB_ETHER_SMSC95XX from boards without it

The SMSC95xx series may exist either directly on a main board, or as a USB
to Ethernet dongle. However, dongles containing these chips are very rare.
Hence, remove this config option, except on Harmony where such a chip is
actually present on the board.

The asix option remains, since it's a popular chip, and I actively use a
dongle containing this.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>

include/configs/paz00.h

@@ -61,7 +61,6 @@
 
 /* USB networking support */
 #define CONFIG_USB_HOST_ETHER
-#define CONFIG_USB_ETHER_SMSC95XX
 #define CONFIG_USB_ETHER_ASIX
 
 /* General networking support */

include/configs/seaboard.h

@@ -110,7 +110,6 @@
 
 /* USB networking support */
 #define CONFIG_USB_HOST_ETHER
-#define CONFIG_USB_ETHER_SMSC95XX
 #define CONFIG_USB_ETHER_ASIX
 
 /* General networking support */

include/configs/trimslice.h

@@ -77,7 +77,6 @@
 
 /* USB networking support */
 #define CONFIG_USB_HOST_ETHER
-#define CONFIG_USB_ETHER_SMSC95XX
 #define CONFIG_USB_ETHER_ASIX
 
 /* General networking support */

include/configs/whistler.h

@@ -77,7 +77,6 @@
 
 /* USB networking support */
 #define CONFIG_USB_HOST_ETHER
-#define CONFIG_USB_ETHER_SMSC95XX
 #define CONFIG_USB_ETHER_ASIX
 
 /* General networking support */