powerpc/opal: Add PHB to cxl mode call

This adds the OPAL call to change a PHB into cxl mode.

Signed-off-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h
index a084cf5..9124b0e 100644
--- a/arch/powerpc/include/asm/opal.h
+++ b/arch/powerpc/include/asm/opal.h
@@ -147,6 +147,7 @@
 #define OPAL_GET_PARAM				89
 #define OPAL_SET_PARAM				90
 #define OPAL_DUMP_RESEND			91
+#define OPAL_PCI_SET_PHB_CXL_MODE		93
 #define OPAL_DUMP_INFO2				94
 #define OPAL_PCI_ERR_INJECT			96
 #define OPAL_PCI_EEH_FREEZE_SET			97
@@ -961,6 +962,7 @@
 int64_t opal_handle_hmi(void);
 int64_t opal_register_dump_region(uint32_t id, uint64_t start, uint64_t end);
 int64_t opal_unregister_dump_region(uint32_t id);
+int64_t opal_pci_set_phb_cxl_mode(uint64_t phb_id, uint64_t mode, uint64_t pe_number);
 
 /* Internal functions */
 extern int early_init_dt_scan_opal(unsigned long node, const char *uname,