samples: drivers: kscan: enable logging, and add RK055HDMIPI4M shield

Enable logging by default in kscan sample, so that user will see output
even if they do not have a keyboard connected that follows the keymap.
Add a specific testcase for boards that support the RK055HDMIPI4M
display.

Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>

samples/drivers/kscan/prj.conf

@@ -1,4 +1,4 @@
 CONFIG_STDOUT_CONSOLE=y
 CONFIG_PRINTK=y
 CONFIG_KSCAN=y
-
+CONFIG_LOG=y

samples/drivers/kscan/sample.yaml

@@ -13,3 +13,16 @@ tests:
         - "kb data(.*)"
       fixture: fixture_connect_keyboard
     depends_on: kscan
+    filter: dt_chosen_enabled("zephyr,keyboard-scan")
+  sample.drivers.kscan.rk055hdmipi4m:
+    tags: drivers kscan
+    harness: console
+    harness_config:
+      type: multi_line
+      ordered: true
+      regex:
+        - "kb data(.*)"
+      fixture: fixture_connect_rk055hdmipi4m
+    depends_on: kscan
+    extra_args: SHIELD="rk055hdmipi4m"
+    platform_allow: mimxrt1170_evk_cm7 mimxrt595_evk_cm33