Add firmware flags for PCIe/MSI

Index: git/arch/powerpc/kernel/prom_init.c
===================================================================
@@ -634,6 +634,12 @@ static void __init early_cmdline_parse(v
 /* ibm,dynamic-reconfiguration-memory property supported */
 #define OV5_DRCONF_MEMORY	0x20
 #define OV5_LARGE_PAGES		0x10	/* large pages supported */
+/* PCIe/MSI support. Without MSI full PCIe is not supported */
+#ifdef CONFIG_PCI_MSI
+#define OV5_MSI			0x01	/* PCIe/MSI supported */
+#else
+#define OV5_MSI			0x00
+#endif
 
 /*
  * The architecture vector has an array of PVR mask/value pairs,

@@ -677,7 +683,7 @@ static unsigned char ibm_architecture_ve
 	/* option vector 5: PAPR/OF options */
 	3 - 1,				/* length */
 	0,				/* don't ignore, don't halt */
-	OV5_LPAR | OV5_SPLPAR | OV5_LARGE_PAGES,
+	OV5_LPAR | OV5_SPLPAR | OV5_LARGE_PAGES | OV5_MSI,
 };
 
 /* Old method - ELF header with PT_NOTE sections */