arm64: configs: Remove obsolete TI config

This config is causing conflicts with how fdtfile variable is
initialized.
For K3 devices, CONFIG_DEFAULT_DEVICE_TREE= "ti/k3-<board>.dtb".
With CONFIG_TI_FDT_FOLDER_PATH also prefixing "ti", fdtfile is then
"ti/ti/k3-<board>.dtb". This variable is updated when fitImage is
booted and fails to boot due to the parsing error "ti/ti/".

Given that there are no other users of this config other than K3 for
now, it is being removed.

Since am64x, j721e and j721s2 also define a DEFAULT_FDT_FILE, update
them to conform to the DEFAULT_DEVICE_TREE standard.

Signed-off-by: Aashvij Shenai <a-shenai@ti.com>
diff --git a/board/ti/j721e/evm.c b/board/ti/j721e/evm.c
index 4b5b9dd..1fa78ff 100644
--- a/board/ti/j721e/evm.c
+++ b/board/ti/j721e/evm.c
@@ -368,9 +368,9 @@
 
 #ifdef CONFIG_BOARD_LATE_INIT
 static struct ti_fdt_map ti_j721e_evm_fdt_map[] = {
-	{"j721e", "k3-j721e-common-proc-board.dtb"},
-	{"j721e-sk", "k3-j721e-sk.dtb"},
-	{"j7200", "k3-j7200-common-proc-board.dtb"},
+	{"j721e", "ti/k3-j721e-common-proc-board.dtb"},
+	{"j721e-sk", "ti/k3-j721e-sk.dtb"},
+	{"j7200", "ti/k3-j7200-common-proc-board.dtb"},
 	{ /* Sentinel. */ }
 };
 static void setup_board_eeprom_env(void)