MIPS: malta: add defconfigs for MIPS64

Add defconfigs for recently introduced MIPS64 support on
Malta boards to get more build coverage for MIPS64.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>

configs/malta64_defconfig

@@ -0,0 +1,16 @@
+CONFIG_MIPS=y
+CONFIG_TARGET_MALTA=y
+CONFIG_CPU_MIPS64_R2=y
+CONFIG_DEFAULT_DEVICE_TREE="mti,malta"
+CONFIG_HUSH_PARSER=y
+CONFIG_SYS_PROMPT="malta # "
+# CONFIG_CMD_LOADB is not set
+# CONFIG_CMD_LOADS is not set
+# CONFIG_CMD_FPGA is not set
+# CONFIG_CMD_SETEXPR is not set
+CONFIG_CMD_DHCP=y
+# CONFIG_CMD_NFS is not set
+CONFIG_CMD_PING=y
+CONFIG_OF_EMBED=y
+CONFIG_SYS_NS16550=y
+CONFIG_USE_PRIVATE_LIBGCC=y

configs/malta64el_defconfig

@@ -0,0 +1,17 @@
+CONFIG_MIPS=y
+CONFIG_TARGET_MALTA=y
+CONFIG_SYS_LITTLE_ENDIAN=y
+CONFIG_CPU_MIPS64_R2=y
+CONFIG_DEFAULT_DEVICE_TREE="mti,malta"
+CONFIG_HUSH_PARSER=y
+CONFIG_SYS_PROMPT="maltael # "
+# CONFIG_CMD_LOADB is not set
+# CONFIG_CMD_LOADS is not set
+# CONFIG_CMD_FPGA is not set
+# CONFIG_CMD_SETEXPR is not set
+CONFIG_CMD_DHCP=y
+# CONFIG_CMD_NFS is not set
+CONFIG_CMD_PING=y
+CONFIG_OF_EMBED=y
+CONFIG_SYS_NS16550=y
+CONFIG_USE_PRIVATE_LIBGCC=y