board: am57xx: MAINTAINERS: Update for current maintainer

Felipe Balbi has move on from TI and the current email ID is no longer
valid. So, replacing with Lokesh.

While at it, update missing config file which was untracked.

Signed-off-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/board/ti/am57xx/MAINTAINERS b/board/ti/am57xx/MAINTAINERS
index b8ae019..500bb7a 100644
--- a/board/ti/am57xx/MAINTAINERS
+++ b/board/ti/am57xx/MAINTAINERS
@@ -1,7 +1,8 @@
 AM57XX EVM
-M:	Felipe Balbi <balbi@ti.com>
+M:	Lokesh Vutla <lokeshvutla@ti.com>
 S:	Maintained
 F:	board/ti/am57xx/
 F:	include/configs/am57xx_evm.h
 F:	configs/am57xx_evm_defconfig
 F:	configs/am57xx_evm_nodt_defconfig
+F:	configs/am57xx_hs_evm_defconfig