runme.sh: fix typo

Signed-off-by: Rabeeh Khoury <rabeeh@solid-run.com>

runme.sh

@@ -23,7 +23,7 @@ BUILDROOT_VERSION=2019.05.2
 RELEASE=${RELEASE:-lx2160a-early-access-bsp0.7}
 BOOT=${BOOT:-sd}
 BOOT_LOADER=${BOOT_LOADER:-u-boot}
-DDOR_SPEED=${DDR_SPEED:-3200}
+DDR_SPEED=${DDR_SPEED:-3200}
 SERDES=${SERDES:-8_5_2}
 UEFI_RELEASE=${UEFI_RELEASE:-RELEASE}