board: ti: j784s4: Add board support for J784S4 EVM

Add board files for J784S4 EVM.

SYS_DISABLE_DCACHE_OPS is selected in the Kconfig because
J784S4/AM69 are a coherent architecture at A72 level by
MSMC support.

Signed-off-by: Hari Nagalla <hnagalla@ti.com>
Signed-off-by: Dasnavis Sabiya <sabiya.d@ti.com>
Signed-off-by: Apurva Nandan <a-nandan@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Tested-by: Marcel Ziswiler <marcel.ziswiler@toradex.com> # AM69-SK
diff --git a/board/ti/j784s4/MAINTAINERS b/board/ti/j784s4/MAINTAINERS
new file mode 100644
index 0000000..037fedb
--- /dev/null
+++ b/board/ti/j784s4/MAINTAINERS
@@ -0,0 +1,6 @@
+J784S4 EVM BOARD
+M:	Apurva Nandan <a-nandan@ti.com>
+S:	Maintained
+F:	board/ti/j784s4
+F:	arch/arm/mach-k3/j784s4
+F:	include/configs/j784s4_evm.h