board/ti: Update MAINTAINERS entries with more boards

A few config files have been added without updating MAINTAINERS.

Reported-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
Signed-off-by: Tom Rini <trini@konsulko.com>

board/ti/am335x/MAINTAINERS

@@ -6,6 +6,7 @@ F:	include/configs/am335x_evm.h
 F:	configs/am335x_boneblack_defconfig
 F:	configs/am335x_boneblack_vboot_defconfig
 F:	configs/am335x_evm_defconfig
+F:	configs/am335x_gp_evm_defconfig
 F:	configs/am335x_evm_nor_defconfig
 F:	configs/am335x_evm_norboot_defconfig
 F:	configs/am335x_evm_spiboot_defconfig

board/ti/am43xx/MAINTAINERS

@@ -7,3 +7,5 @@ F:	configs/am43xx_evm_defconfig
 F:	configs/am43xx_evm_qspiboot_defconfig
 F:	configs/am43xx_evm_ethboot_defconfig
 F:	configs/am43xx_evm_usbhost_boot_defconfig
+F:	configs/am437x_gp_evm_defconfig
+F:	configs/am437x_sk_evm_defconfig

board/ti/dra7xx/MAINTAINERS

@@ -3,6 +3,8 @@ M:	Lokesh Vutla <lokeshvutla@ti.com>
 S:	Maintained
 F:	board/ti/dra7xx/
 F:	include/configs/dra7xx_evm.h
+F:	configs/dra72_evm_defconfig
+F:	configs/dra74_evm_defconfig
 F:	configs/dra7xx_evm_defconfig
 F:	configs/dra7xx_evm_qspiboot_defconfig
 F:	configs/dra7xx_evm_uart3_defconfig