configs: omap3_logic: Enable CONFIG_SPL_ALLOC_BD

With bd_info dropped from the data section, the Logic PD OMAP3 boards
and AM3517 fail to boot. Enabling CONFIG_SPL_ALLOC_BD restores
them.

Fixes: 38d6b7ebdaee ("spl: Drop bd_info in the data section")
Signed-off-by: Adam Ford <aford173@gmail.com>
diff --git a/configs/am3517_evm_defconfig b/configs/am3517_evm_defconfig
index bae0e0a..0bc7bf7 100644
--- a/configs/am3517_evm_defconfig
+++ b/configs/am3517_evm_defconfig
@@ -15,6 +15,7 @@
 CONFIG_DISTRO_DEFAULTS=y
 CONFIG_BOOTDELAY=10
 # CONFIG_USE_BOOTCOMMAND is not set
+CONFIG_SPL_ALLOC_BD=y
 CONFIG_SPL_SYS_MALLOC_SIMPLE=y
 CONFIG_SPL_SEPARATE_BSS=y
 # CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR is not set