ppc: fix incorrect spelling of PowerMac

PowerMac is spelled as PowerMAC (Media Access Control) in some places.
This is misleading.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2297
Signed-off-by: Tejas Vipin <tejasvipin76@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
diff --git a/docs/system/ppc/powermac.rst b/docs/system/ppc/powermac.rst
index 04334ba..3eac81c 100644
--- a/docs/system/ppc/powermac.rst
+++ b/docs/system/ppc/powermac.rst
@@ -4,8 +4,8 @@
 Use the executable ``qemu-system-ppc`` to simulate a complete PowerMac
 PowerPC system.
 
-- ``g3beige``              Heathrow based PowerMAC
-- ``mac99``                Mac99 based PowerMAC
+- ``g3beige``              Heathrow based PowerMac
+- ``mac99``                Mac99 based PowerMac
 
 Supported devices
 -----------------
diff --git a/hw/ppc/mac_newworld.c b/hw/ppc/mac_newworld.c
index ff9e490..9d249a5 100644
--- a/hw/ppc/mac_newworld.c
+++ b/hw/ppc/mac_newworld.c
@@ -571,7 +571,7 @@
     MachineClass *mc = MACHINE_CLASS(oc);
     FWPathProviderClass *fwc = FW_PATH_PROVIDER_CLASS(oc);
 
-    mc->desc = "Mac99 based PowerMAC";
+    mc->desc = "Mac99 based PowerMac";
     mc->init = ppc_core99_init;
     mc->block_default_type = IF_IDE;
     /* SMP is not supported currently */
diff --git a/hw/ppc/mac_oldworld.c b/hw/ppc/mac_oldworld.c
index 1981d3d..eef3261 100644
--- a/hw/ppc/mac_oldworld.c
+++ b/hw/ppc/mac_oldworld.c
@@ -411,7 +411,7 @@
     MachineClass *mc = MACHINE_CLASS(oc);
     FWPathProviderClass *fwc = FW_PATH_PROVIDER_CLASS(oc);
 
-    mc->desc = "Heathrow based PowerMAC";
+    mc->desc = "Heathrow based PowerMac";
     mc->init = ppc_heathrow_init;
     mc->block_default_type = IF_IDE;
     /* SMP is not supported currently */