configs: mscc_servalt: Add network support

Update default config to use network driver for ServalT SoCs.
Signed-off-by: NHoratiu Vultur <horatiu.vultur@microchip.com>

configs/mscc_servalt_defconfig

@@ -24,7 +24,6 @@ CONFIG_CMD_MEMTEST=y
 CONFIG_CMD_GPIO=y
 CONFIG_CMD_SF=y
 CONFIG_CMD_SPI=y
-# CONFIG_CMD_NET is not set
 CONFIG_CMD_MTDPARTS=y
 CONFIG_MTDIDS_DEFAULT="nor0=spi_flash"
 CONFIG_MTDPARTS_DEFAULT="mtdparts=spi_flash:1m(UBoot),256k(Env),256k(Env.bk)"
@@ -59,3 +58,8 @@ CONFIG_SYS_NS16550=y
 CONFIG_SPI=y
 CONFIG_DM_SPI=y
 CONFIG_LZMA=y
+CONFIG_CMD_DHCP=y
+# CONFIG_NET_TFTP_VARS is not set
+# CONFIG_CMD_NFS is not set
+CONFIG_CMD_PING=y
+CONFIG_MSCC_SERVALT_SWITCH=y