Fix: adjust LPC546xx Part ID printed to hexadecimal

[ALTracer]

Detailed description

• No new features.
• The existing problem is LPC546xx: Part ID 0x4294264328 being logged as highlighted by recent advancements in LPC546xx flash loading broken #1520. Should be 0xfff54608.
• The PR solves it by swapping format specifier in lpc546xx.c to lowercase hexadecimal, like in lpc11xx.c and others.

This existed since #1522 which was my 7th merged PR here, I was not as experienced or acquainted with codebase, also untested on unavailable LPC silicon. By grepping current drivers I don't see other obvious instances of this.
grep 'DEBUG_INFO.*ID.*PRIu32' src/target/*.c one unrelated hit in adiv5.c
grep 'DEBUG_INFO.*ID.*PRIx32' src/target/*.c 14 hits.

Your checklist for this pull request

• I've read the Code of Conduct
• I've read the guidelines for contributing to this repository
• It builds for hardware native (see Building the firmware)
• It builds as BMDA (see Building the BMDA)
• I've tested it to the best of my ability
• My commit messages provide a useful short description of what the commits do

Closing issues

[dragonmux]

LGTM, merging. Thank you for the contribution!