[U-Boot] Build failure in u-boot-mmc/master: undefined reference to error

[Stephen Warren]

With the latest content of u-boot-mmc/master, 41dc35a149b3 "drivers: 
mmc: Avoid memory leak in case of failure", all Tegra boards (perhaps 
others too; my system only tests Tegra) fail to build with the following 
error:

> drivers/built-in.o: In function `mmc_select_mode_and_width':
> /var/lib/jenkins/workspace/u-boot-denx_uboot_mmc-master-build/src/u-boot/drivers/mmc/mmc.c:1847: undefined reference to `error'
> drivers/built-in.o: In function `bus_width':
> /var/lib/jenkins/workspace/u-boot-denx_uboot_mmc-master-build/src/u-boot/drivers/mmc/mmc.c:1436: undefined reference to `error'
> /var/lib/jenkins/workspace/u-boot-denx_uboot_mmc-master-build/src/u-boot/drivers/mmc/mmc.c:1436: undefined reference to `error'
> /var/lib/jenkins/workspace/u-boot-denx_uboot_mmc-master-build/src/u-boot/drivers/mmc/mmc.c:1436: undefined reference to `error'
> drivers/built-in.o: In function `mmc_get_capabilities':
> /var/lib/jenkins/workspace/u-boot-denx_uboot_mmc-master-build/src/u-boot/drivers/mmc/mmc.c:831: undefined reference to `error'
> arm-none-eabi-ld.bfd: BFD (2.24-2ubuntu2+4) 2.24 assertion fail ../../binutils-2.24/bfd/elf32-arm.c:7696
> arm-none-eabi-ld.bfd: error: required section '.rel.plt' not found in the linker script
> arm-none-eabi-ld.bfd: final link failed: Invalid operation