cmd/ti: Update Kconfig logic and Makefile recursion logic

- Add some dependencies to CMD_DDR3 as this is only valid on some
  platforms (which tend to select it as well).
- The proper gate for going in to cmd/ti is not
  CONFIG_TI_COMMON_CMD_OPTIONS as nothing under there is controlled by
  that symbol but the general TI architecture options.

Signed-off-by: Tom Rini <trini@konsulko.com>

cmd/Makefile

@@ -235,6 +235,11 @@ obj-$(CONFIG_X86) += x86/
 obj-$(CONFIG_CMD_MESON) += meson/
 
 obj-$(CONFIG_ARCH_MVEBU) += mvebu/
+
+# TI
+obj-$(CONFIG_ARCH_KEYSTONE) += ti/
+obj-$(CONFIG_ARCH_K3) += ti/
+obj-$(CONFIG_ARCH_OMAP2PLUS) += ti/
 endif # !CONFIG_SPL_BUILD
 
 obj-$(CONFIG_$(SPL_)CMD_TLV_EEPROM) += tlv_eeprom.o
@@ -244,8 +249,6 @@ obj-y += nvedit.o
 
 obj-$(CONFIG_CMD_BCM_EXT_UTILS) += broadcom/
 
-obj-$(CONFIG_TI_COMMON_CMD_OPTIONS) += ti/
-
 filechk_data_gz = (echo "static const char data_gz[] ="; cat $< | scripts/bin2c; echo ";")
 
 filechk_data_size = \