x86: qemu-x86_64: Enable NVMe

NVMe was turned on in qemu-x86 but somehow we missed it for 64-bit.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/qemu-x86_64_defconfig b/configs/qemu-x86_64_defconfig
index 3ffcb4a..d8792d6 100644
--- a/configs/qemu-x86_64_defconfig
+++ b/configs/qemu-x86_64_defconfig
@@ -63,6 +63,7 @@
 CONFIG_SYSCON=y
 CONFIG_SPL_SYSCON=y
 CONFIG_CPU=y
+CONFIG_NVME=y
 CONFIG_SPL_DM_RTC=y
 CONFIG_SPI=y
 CONFIG_SPL_TIMER=y