Dependencies for `SOC_FLASH_MCUX` are incorrect on LPC55xxx platforms

[danieldegrasse]

Describe the bug
Samples enabling CONFIG_FLASH fail to build on the LPC55S69 CPU1 target, due to the IAP flash driver being enabled when it should not be.

Please also mention any information which could help others to understand
the problem you're facing:

• What target platform are you using?
  lpcxpresso55s69/lpc55s69/cpu1
• Is this a regression? If yes, have you been able to "git bisect" it to a
  specific commit?
  Yes, the introduction of HWMv2

To Reproduce

Expected behavior
Build should pass

Impact
Blocking CI on #72102

Logs and console output

 /__w/zephyr/zephyr/drivers/flash/soc_flash_mcux.c:41:2: error: #error No matching compatible for soc_flash_mcux.c
   41 | #error No matching compatible for soc_flash_mcux.c
      |  ^~~~~
/__w/zephyr/zephyr/drivers/flash/soc_flash_mcux.c:53:10: fatal error: fsl_flash.h: No such file or directory
   53 | #include "fsl_flash.h"
      |          ^~~~~~~~~~~~~
compilation terminated.
ninja: build stopped: subcommand failed.

Environment (please complete the following information):

• OS: Linux
• Toolchain: Zephyr SDK
• Commit SHA or Version used: d7ab4f2 (main)