dm: am33xx: Move to driver model for GPIO and serial

Adjust the configuration for the am33xx boards, including beaglebone black
to use driver model.

This can be extended to other OMAP boards once platform data is provided
for them.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Acked-by: NTom Rini <trini@ti.com>

include/configs/ti_am335x_common.h

@@ -19,12 +19,23 @@
 #define CONFIG_SYS_TIMERBASE		0x48040000	/* Use Timer2 */
 #define CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC
 
+#ifndef CONFIG_SPL_BUILD
+# define CONFIG_DM
+# define CONFIG_CMD_DM
+# define CONFIG_DM_GPIO
+# define CONFIG_DM_SERIAL
+# define CONFIG_OMAP_SERIAL
+# define CONFIG_SYS_MALLOC_F_LEN	(1 << 10)
+#endif
+
 #include <asm/arch/omap.h>
 
 /* NS16550 Configuration */
 #define CONFIG_SYS_NS16550
+#ifdef CONFIG_SPL_BUILD
 #define CONFIG_SYS_NS16550_SERIAL
 #define CONFIG_SYS_NS16550_REG_SIZE	(-4)
+#endif
 #define CONFIG_SYS_NS16550_CLK		48000000
 
 /* Network defines. */