board_f: Factor out bdinfo bi_mem{start, size} to setup_bdinfo

Move all assignments to gd->bd->bi_mem{start,size} to generic code in
setup_bdinfo.

Xtensa architecture is special in this regard as it defines its own
handling of gd->bd->bi_mem{start,size} fields. In order to avoid defining
a weak SDRAM function, let arch_setup_bdinfo overwrite the generic flags.

For ARC architecture, remove ARCH_EARLY_INIT_R from Kconfig since it is
not needed anymore.

Also, use gd->ram_base to populate bi_memstart to avoid an ifdef.

Signed-off-by: Ovidiu Panait <ovidiu.panait@windriver.com>
Acked-by: Alexey Brodkin <abrokdin@synopsys.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

common/board_f.c

@@ -605,6 +605,11 @@ __weak int arch_setup_bdinfo(void)
 
 int setup_bdinfo(void)
 {
+	struct bd_info *bd = gd->bd;
+
+	bd->bi_memstart = gd->ram_base;  /* start of memory */
+	bd->bi_memsize = gd->ram_size;   /* size in bytes */
+
 	return arch_setup_bdinfo();
 }
 
@@ -614,12 +619,6 @@ static int setup_board_part1(void)
 {
 	struct bd_info *bd = gd->bd;
 
-	/*
-	 * Save local variables to board info struct
-	 */
-	bd->bi_memstart = CONFIG_SYS_SDRAM_BASE;	/* start of memory */
-	bd->bi_memsize = gd->ram_size;			/* size in bytes */
-
 #ifdef CONFIG_SYS_SRAM_BASE
 	bd->bi_sramstart = CONFIG_SYS_SRAM_BASE;	/* start of SRAM */
 	bd->bi_sramsize = CONFIG_SYS_SRAM_SIZE;		/* size  of SRAM */