da8xx: ea20: Add the configuration define for the exact SoC variant

Signed-off-by: Tomas Novotny <tomas@novotny.cz>
Cc: Tom Rini <trini@ti.com>
Cc: Stefano Babic <sbabic@denx.de>
Acked-by: Stefano Babic <sbabic@denx.de>

include/configs/ea20.h

@@ -42,6 +42,7 @@
 #define CONFIG_MACH_DAVINCI_DA850_EVM
 #define CONFIG_ARM926EJS		/* arm926ejs CPU core */
 #define CONFIG_SOC_DA8XX		/* TI DA8xx SoC */
+#define CONFIG_SOC_DA850		/* TI DA850 SoC */
 #define CONFIG_SYS_CLK_FREQ		clk_get(DAVINCI_ARM_CLKID)
 #define CONFIG_SYS_OSCIN_FREQ		24000000
 #define CONFIG_SYS_TIMERBASE		DAVINCI_TIMER0_BASE