drivers/net/r8168.c: Guard against generating power resource

Not all platforms need to generate power resources, but the code does
not get optimized out at build time because the devicetree gets
compiled into a linked list. As this code pulls in some heavy ACPI
dependencies that is even implemented with weak empty function it
makes sense to optimize out this code using a Kconfig constant.

This saves 1.5K in ramstage size on gigabyte/ga-945gcm-s2l.

Change-Id: I82289aa7e6e82318417f3b827b86182891dfc2a6
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58657
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

0 files changed, 0 insertions, 0 deletions