cxl: Move common code away from bare-metal-specific files

Move around some functions which will be accessed from the bare-metal
and guest environments.
Code in native.c and pci.c is meant to be bare-metal specific.
Other files contain code which may be shared with guests.

Co-authored-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
Reviewed-by: Manoj Kumar <manoj@linux.vnet.ibm.com>
Acked-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/drivers/misc/cxl/irq.c b/drivers/misc/cxl/irq.c
index 09a4060..e468e6c 100644
--- a/drivers/misc/cxl/irq.c
+++ b/drivers/misc/cxl/irq.c
@@ -93,7 +93,7 @@
 	return IRQ_HANDLED;
 }
 
-static irqreturn_t cxl_irq(int irq, void *data, struct cxl_irq_info *irq_info)
+irqreturn_t cxl_irq(int irq, void *data, struct cxl_irq_info *irq_info)
 {
 	struct cxl_context *ctx = data;
 	u64 dsisr, dar;
@@ -291,12 +291,12 @@
 	irq_dispose_mapping(virq);
 }
 
-static int cxl_register_one_irq(struct cxl *adapter,
-				irq_handler_t handler,
-				void *cookie,
-				irq_hw_number_t *dest_hwirq,
-				unsigned int *dest_virq,
-				const char *name)
+int cxl_register_one_irq(struct cxl *adapter,
+			irq_handler_t handler,
+			void *cookie,
+			irq_hw_number_t *dest_hwirq,
+			unsigned int *dest_virq,
+			const char *name)
 {
 	int hwirq, virq;