tests: xip: remove hack and add qemu_x86_xip

We now have a variant x86 build target that only is run
for tests tagged with "xip", which is this one.

Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>

boards/x86/qemu_x86/qemu_x86_xip.dts

@@ -0,0 +1,7 @@
+/*
+ * Copyright (c) 2020 Intel Corporation
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "qemu_x86.dts"

boards/x86/qemu_x86/qemu_x86_xip.yaml

@@ -0,0 +1,12 @@
+identifier: qemu_x86_xip
+name: QEMU Emulation for X86 (XIP enabled)
+type: qemu
+arch: x86
+simulation: qemu
+toolchain:
+  - zephyr
+  - xtools
+testing:
+  default: true
+  only_tags:
+     - xip

boards/x86/qemu_x86/qemu_x86_xip_defconfig

@@ -0,0 +1,19 @@
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_SOC_IA32=y
+CONFIG_BOARD_QEMU_X86=y
+CONFIG_HPET_TIMER=y
+CONFIG_PIC_DISABLE=y
+CONFIG_LOAPIC=y
+CONFIG_CONSOLE=y
+CONFIG_SERIAL=y
+CONFIG_UART_NS16550=y
+CONFIG_UART_CONSOLE=y
+CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=25000000
+CONFIG_TEST_RANDOM_GENERATOR=y
+CONFIG_DEBUG_INFO=y
+CONFIG_SCHED_SCALABLE=y
+CONFIG_WAITQ_SCALABLE=y
+CONFIG_X86_VERY_EARLY_CONSOLE=y
+CONFIG_QEMU_ICOUNT_SHIFT=5
+CONFIG_XIP=y

tests/kernel/xip/testcase.yaml

@@ -2,11 +2,3 @@ tests:
   arch.common.xip:
     filter: CONFIG_XIP
     tags: xip
-
-  # Platforms where XIP is supported but not on by default (rare, typically
-  # emulator targets, to show that XIP is working for a particular arch)
-  arch.common.xip.nondefault:
-    platform_whitelist: qemu_x86 qemu_x86_coverage
-    extra_configs:
-     - CONFIG_XIP=y
-    tags: xip