zephyr/boards: Add PocketBeagle 2 rev A0 m4 support.

Add support for PocketBeagle 2 rev A0 m4.  Since it has 256K of SRAM (split
into 192K instruction and 64K data regions), some things need to be
disabled in MicroPython to make it fit.

Signed-off-by: Ayush Singh <ayush@beagleboard.org>

Author: Ayush1325

ports/zephyr/boards/pocketbeagle_2_am6232_m4.conf

@@ -0,0 +1,30 @@
+# Disable Networking
+CONFIG_NETWORKING=n
+CONFIG_NET_IPV4=n
+CONFIG_NET_IPV6=n
+CONFIG_NET_UDP=n
+CONFIG_NET_TCP=n
+CONFIG_NET_SOCKETS=n
+CONFIG_TEST_RANDOM_GENERATOR=n
+
+CONFIG_NET_CONFIG_SETTINGS=n
+CONFIG_NET_CONFIG_NEED_IPV6=n
+CONFIG_NET_CONFIG_NEED_IPV4=n
+
+CONFIG_DNS_RESOLVER=n
+CONFIG_DNS_SERVER1=""
+CONFIG_DNS_SERVER_IP_ADDRESSES=n
+
+CONFIG_NET_BUF_POOL_USAGE=n
+CONFIG_NET_DHCPV4=n
+
+CONFIG_NET_CONFIG_MY_IPV6_ADDR=""
+CONFIG_NET_CONFIG_MY_IPV4_ADDR=""
+CONFIG_NET_CONFIG_MY_IPV4_GW=""
+
+# Disable FAT support. Does not fit
+CONFIG_MICROPY_VFS_FAT=n
+
+# Only elf output is used
+CONFIG_BUILD_OUTPUT_BIN=n
+CONFIG_BUILD_OUTPUT_HEX=n