sandbox: fix build error due to missing struct udevice definition

Without this patch, compiling may potentially fail.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
31 jobs for testing in 130 minutes and 15 seconds (queued for 47 minutes and 4 seconds)
Status Job ID Name Coverage
  Testsuites
passed #19754
all
Build envtools

00:00:26

passed #19753
all
Build tools-only

00:00:27

passed #19752
all
Check for configs without MAINTAINERS entry

00:00:23

passed #19755
all
Run binman, buildman, dtoc and patman testsuites

00:01:02

passed #19749
all
cppcheck

00:07:42

passed #19750
all
grep TODO/FIXME/HACK

00:00:25

passed #19751
all
sloccount

00:00:43

 
  Test.Py
passed #19758
all
evb-ast2500 test.py

00:00:53

passed #19762
all
integratorcp_cm926ejs test.py

00:00:45

passed #19769
all
qemu-ppce500 test.py

00:00:47

passed #19770
all
qemu-riscv64 test.py

00:01:08

passed #19771
all
qemu-x86 test.py

00:01:25

passed #19772
all
qemu-x86_64 test.py

00:01:22

passed #19763
all
qemu_arm test.py

00:01:16

passed #19764
all
qemu_arm64 test.py

00:01:16

passed #19765
all
qemu_mips test.py

00:00:47

passed #19767
all
qemu_mips64 test.py

00:00:46

passed #19768
all
qemu_mips64el test.py

00:00:44

passed #19766
all
qemu_mipsel test.py

00:00:45

passed #19756
all
sandbox test.py

00:01:52

passed #19759
all
sandbox_flattree test.py

00:01:02

passed #19757
all
sandbox_spl test.py

00:00:59

passed #19760
all
vexpress_ca15_tc2 test.py

00:00:48

passed #19761
all
vexpress_ca9x4 test.py

00:00:48

passed #19774
all
xilinx_versal_virt test.py

00:00:48

passed #19775
all
xtfpga test.py

00:00:44

passed #19773
all
zynq_zc702 test.py

00:00:52

 
  World Build
passed #19776
all
build all 32bit ARM platforms

00:50:52

passed #19777
all
build all 64bit ARM platforms

00:18:21

passed #19778
all
build all PowerPC platforms

00:19:58

passed #19779
all
build all other platforms

00:09:54