configs: Add configs for AM65x High Security EVM

Add new defconfig files for the AM65x High Security EVM.

This defconfigs are the same as for the non-secure part, except for:
    CONFIG_TI_SECURE_DEVICE option set to 'y'
    CONFIG_FIT_IMAGE_POST_PROCESS option set to 'y'
    CONFIG_SPL_FIT_IMAGE_POST_PROCESS option set to 'y'

Signed-off-by: Andrew F. Davis <afd@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Andreas Dannenberg <dannenberg@ti.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 0e8e3d4..09f31cd 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -746,6 +746,8 @@
 F:	configs/k2e_hs_evm_defconfig
 F:	configs/k2g_hs_evm_defconfig
 F:	configs/k2l_hs_evm_defconfig
+F:	configs/am65x_hs_evm_r5_defconfig
+F:	configs/am65x_hs_evm_a53_defconfig
 
 TQ GROUP
 #M:	Martin Krause <martin.krause@tq-systems.de>