Fix issue in FLEXCAN_EnableInterrupts and FLEXCAN_DisableInterrupts w…

[abascom]

…hich may inadvertently change PRESDIV in the CTRL1 register.

Prerequisites

• [X] I have checked latest main branch and the issue still exists.
• [X] I did not see it is stated as known-issue in release notes.
• [X] No similar GitHub issue is related to this change.
• [X] My code follows the commit guidelines of this project.
• [X] I have performed a self-review of my own code.
• [X] My changes generate no new warnings.
• [ ] I have added tests that prove my fix is effective or that my feature works.

Describe the pull request

Fixes an issue in fsl_flexcan.h which could inadvertently change the PRESDIV value in the CTRL1 register.

Type of change (please delete options that are not relevant):

• [X] Bug fix (non-breaking change which fixes an issue)

Tests

• Test configuration (please complete the following information):
  • Hardware setting: 1052 EVKB dev kit
  • Toolchain: gcc arm embedded
  • Test Tool preparation: NA
  • Any other dependencies: No
• Test executed Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce.
  • [X] Build Test
  • [X] Run Test - Tested CAN communication functioned properly on the 1052 EVKB dev board.

[mcuxsusan]

Many thanks for your contribution, will ask developer to help review the change. Appreciate for your patience.