media: platform: rename am437x/ to ti/am437x/

As the end goal is to have platform drivers split by vendor,
rename am437x/ to ti/am437x/.

Reviewed-by: Laurent Pinchart <[e-mail]>
Reviewed-by: Lad Prabhakar <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

MAINTAINERS

···
 W:	https://linuxtv.org
 Q:	http://patchwork.linuxtv.org/project/linux-media/list/
 T:	git git://linuxtv.org/mhadli/v4l-dvb-davinci_devices.git
-F:	drivers/media/platform/am437x/
+F:	drivers/media/platform/ti/am437x/
 
 TI BANDGAP AND THERMAL DRIVER
 M:	Eduardo Valentin <[e-mail]>

drivers/media/platform/Kconfig

···
 source "drivers/media/platform/st/sti/Kconfig"
 source "drivers/media/platform/st/stm32/Kconfig"
 source "drivers/media/platform/ti-vpe/Kconfig"
+source "drivers/media/platform/ti/am437x/Kconfig"
 source "drivers/media/platform/via/Kconfig"
 source "drivers/media/platform/xilinx/Kconfig"
 

drivers/media/platform/Makefile

···
 obj-y += st/sti/hva/
 obj-y += st/stm32/
 obj-y += ti-vpe/
+obj-y += ti/am437x/
 obj-y += via/
 obj-y += xilinx/