ARM: linker script: factor out some common definitions between XIP and non-XIP

Lots of duplications between vmlinux.lds.S and vmlinux-xip.lds.S.
This may lead to one file being updated but not the other. For example,
SOFTIRQENTRY_TEXT and HYPERVISOR_TEXT were missing from the XIP version.

This creates vmlinux.lds.h where a bunch of common defines are moved.

Signed-off-by: Nicolas Pitre <nico@linaro.org>
Tested-by: Chris Brandt <Chris.Brandt@renesas.com>

arch/arm/kernel/vmlinux.lds.h

@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifdef CONFIG_HOTPLUG_CPU
+#define ARM_CPU_DISCARD(x)
+#define ARM_CPU_KEEP(x)		x
+#else
+#define ARM_CPU_DISCARD(x)	x
+#define ARM_CPU_KEEP(x)
+#endif
+
+#if (defined(CONFIG_SMP_ON_UP) && !defined(CONFIG_DEBUG_SPINLOCK)) || \
+	defined(CONFIG_GENERIC_BUG) || defined(CONFIG_JUMP_LABEL)
+#define ARM_EXIT_KEEP(x)	x
+#define ARM_EXIT_DISCARD(x)
+#else
+#define ARM_EXIT_KEEP(x)
+#define ARM_EXIT_DISCARD(x)	x
+#endif
+
+#define PROC_INFO							\
+		. = ALIGN(4);						\
+		VMLINUX_SYMBOL(__proc_info_begin) = .;			\
+		*(.proc.info.init)					\
+		VMLINUX_SYMBOL(__proc_info_end) = .;
+
+#define HYPERVISOR_TEXT							\
+		VMLINUX_SYMBOL(__hyp_text_start) = .;			\
+		*(.hyp.text)						\
+		VMLINUX_SYMBOL(__hyp_text_end) = .;
+
+#define IDMAP_TEXT							\
+		ALIGN_FUNCTION();					\
+		VMLINUX_SYMBOL(__idmap_text_start) = .;			\
+		*(.idmap.text)						\
+		VMLINUX_SYMBOL(__idmap_text_end) = .;			\
+		. = ALIGN(PAGE_SIZE);					\
+		VMLINUX_SYMBOL(__hyp_idmap_text_start) = .;		\
+		*(.hyp.idmap.text)					\
+		VMLINUX_SYMBOL(__hyp_idmap_text_end) = .;
+