PPC: spapr: Remove global variable

Global variables are bad. Let's move spapr_has_graphics into the
machine state struct.

Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/hw/spapr.c b/hw/spapr.c
index 709673e..aa39d2d 100644
--- a/hw/spapr.c
+++ b/hw/spapr.c
@@ -83,7 +83,6 @@
 #define PHANDLE_XICP            0x00001111
 
 sPAPREnvironment *spapr;
-bool spapr_has_graphics;
 
 qemu_irq spapr_allocate_irq(uint32_t hint, uint32_t *irq_num,
                             enum xics_irq_type type)
@@ -508,7 +507,7 @@
         }
     }
 
-    if (!spapr_has_graphics) {
+    if (!spapr->has_graphics) {
         spapr_populate_chosen_stdout(fdt, spapr->vio_bus);
     }
 
@@ -736,7 +735,7 @@
 
     /* Graphics */
     if (spapr_vga_init(QLIST_FIRST(&spapr->phbs)->host_state.bus)) {
-        spapr_has_graphics = true;
+        spapr->has_graphics = true;
     }
 
     if (rma_size < (MIN_RMA_SLOF << 20)) {
diff --git a/hw/spapr.h b/hw/spapr.h
index 9153f29..fe40e7d 100644
--- a/hw/spapr.h
+++ b/hw/spapr.h
@@ -23,6 +23,7 @@
     int next_irq;
     int rtc_offset;
     char *cpu_model;
+    bool has_graphics;
 } sPAPREnvironment;
 
 #define H_SUCCESS         0