manifest: bootloader: mcuboot: Fix wrong use of if defined

The file nrf_cleanup.c has
"#if defined(USE_PARTITION_MANAGER)"
Which is true even if USE_PARTITION_MANAGER=n.
This must be changed to "#if USE_PARTITION_MANAGER" for correct
behaviour.

Ref: NCSIDB-987

Signed-off-by: Ole Sæther <ole.saether@nordicsemi.no>

west.yml

@@ -127,7 +127,7 @@ manifest:
  compare-by-default: false
  - name: mcuboot
  repo-path: sdk-mcuboot
- revision: 4e84f31172c5120bb9d300603d28ff2759d7b640
+ revision: 823fd369c1430b50d263ccd6fbcf98bdd44001ba
  path: bootloader/mcuboot
  - name: qcbor
  url: https://github.com/laurencelundblade/QCBOR.git