am3517_evm: Drop inadvertently added line

I added in the CONFIG_MISC_INIT_R line by mistake when applying the
previous patch, fix.

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

include/configs/am3517_evm.h

@@ -25,7 +25,6 @@
 #include <configs/ti_omap3_common.h>
 
 #undef CONFIG_DM_I2C_COMPAT
-#define CONFIG_MISC_INIT_R
 #define CONFIG_REVISION_TAG
 
 /* Hardware drivers */