mac_{old|new}world: Set tbfreq at declaration

The tbfreq variable is only set once in an if-else which can be done
at the variable declaration saving some lines of code and making it
simpler.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Message-Id: <15668da8eb8bad4561428a5f25b02f91e16d9c1b.1666957578.git.balaton@eik.bme.hu>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
diff --git a/hw/ppc/mac_newworld.c b/hw/ppc/mac_newworld.c
index 27e4e8d..6327694 100644
--- a/hw/ppc/mac_newworld.c
+++ b/hw/ppc/mac_newworld.c
@@ -130,7 +130,7 @@
     DeviceState *dev, *pic_dev;
     DeviceState *uninorth_internal_dev = NULL, *uninorth_agp_dev = NULL;
     hwaddr nvram_addr = 0xFFF04000;
-    uint64_t tbfreq;
+    uint64_t tbfreq = kvm_enabled() ? kvmppc_get_tbfreq() : TBFREQ;
 
     /* init CPUs */
     for (i = 0; i < machine->smp.cpus; i++) {
@@ -343,13 +343,6 @@
     has_adb = (core99_machine->via_config == CORE99_VIA_CONFIG_CUDA ||
                core99_machine->via_config == CORE99_VIA_CONFIG_PMU_ADB);
 
-    /* Timebase Frequency */
-    if (kvm_enabled()) {
-        tbfreq = kvmppc_get_tbfreq();
-    } else {
-        tbfreq = TBFREQ;
-    }
-
     /* init basic PC hardware */
     pci_bus = PCI_HOST_BRIDGE(uninorth_pci)->bus;