gateware: bootloader: rev2: Added a delay slot for re-timing the `SLO…

…T_CHANGED` signal so we hopefully latch it correctly

squishy/gateware/bootloader/rev2.py

@@ -180,7 +180,7 @@ def elaborate(self, platform: SquishyPlatformType | None) -> Module:
 			with m.State('IDLE'):
 				m.d.sync += [ psram.rst_addrs.eq(0), ]
 				with m.If(slot_changed):
-					m.next = 'SLOT_CHANGED'
+					m.next = 'WAIT_SLOT'
 				with m.Elif(dl_start):
 					m.d.sync += [
 						bus_hold.eq(1),
@@ -194,6 +194,8 @@ def elaborate(self, platform: SquishyPlatformType | None) -> Module:
 					# reboot anyway.
 					m.next = 'REQUEST_REBOOT'
 
+			with m.State('WAIT_SLOT'):
+				m.next = 'SLOT_CHANGED'
 			with m.State('SLOT_CHANGED'):
 				m.d.sync += [
 					regs.slot.dest.eq(slot_selection),