kernel: Bump to 6.6.56

kernel: dts: 2712: Reduce default cma usage on Pi5
See: raspberrypi/linux#6361

kernel: drm/v3d,vc4: Stop the active perfmon before being destroyed
See: raspberrypi/linux#6401

kernel: mmc: sd: disable sd cqhci by default
See: raspberrypi/linux#6405

kernel: drm/vc4: Rework UPM allocation to avoid double buffering
See: raspberrypi/linux#6385

kernel: dts: bcm2712d0: Add non-d0 vc6 compatible string
See: raspberrypi/linux#6408

Author: popcornmix

boot/bcm2712-rpi-5-b.dtb

@@ -378,9 +378,9 @@ Params:
                                 non-lite SKU of CM4).
                                 (default "on")
 
-        sd_cqe                  Set to "off" to disable Command Queueing if you
-                                have an incompatible Class A2 SD card
-                                (Pi 5 only, default "on")
+        sd_cqe                  Use to enable Command Queueing on the SD
+                                interface for faster Class A2 card performance
+                                (Pi 5 only, default "off")
 
         sd_overclock            Clock (in MHz) to use when the MMC framework
                                 requests 50MHz