hw/arm/virt: Update comment about Multiprocessor Affinity Register

Support on ARMv7 has been dropped in commit 82bf7ae84ce
("target/arm: Remove KVM support for 32-bit Arm hosts").
Update the comment in virt_cpu_mp_affinity() to avoid
mentioning it.

Suggested-by: Andrew Jones <ajones@ventanamicro.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20250429153907.31866-2-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index bd1a686..03fef07 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -1766,12 +1766,7 @@
     uint8_t clustersz;
 
     /*
-     * Adjust MPIDR like 64-bit KVM hosts, which incorporate the
-     * GIC's target-list limitations. 32-bit KVM hosts currently
-     * always create clusters of 4 CPUs, but that is expected to
-     * change when they gain support for gicv3. When KVM is enabled
-     * it will override the changes we make here, therefore our
-     * purposes are to make TCG consistent (with 64-bit KVM hosts)
+     * Adjust MPIDR to make TCG consistent (with 64-bit KVM hosts)
      * and to improve SGI efficiency.
      */
     if (vms->gic_version == VIRT_GIC_VERSION_2) {