sanity: filter the build-all test for ethernet

Ethernet build-all test was not being filtered base on RAM size so
build step LINK was failing with "region `RAM' overflowed by 192
bytes" error when running daily sanitycheck.

Added filter so this test is not attempted for boards with smaller
RAM such as quark_d2000_crb, which was causing daily build failure

Change-Id: I4ed3bef4f1c78e83890331db34fb1f2b2b066414
Signed-off-by: Genaro Saucedo Tejada <[email protected]>
(cherry picked from commit 1589f2c)

Author: gsaucedo

tests/drivers/build_all/testcase.ini

@@ -30,3 +30,4 @@ filter = not ((CONFIG_DEBUG or CONFIG_ASSERT)) and ( CONFIG_SRAM_SIZE >= 32
 build_only = true
 tags = drivers footprint
 extra_args = CONF_FILE=ethernet.conf
+filter = CONFIG_SRAM_SIZE >= 32 or CONFIG_DCCM_SIZE >= 32 or CONFIG_RAM_SIZE >= 32