[Mohdaasim18]

Summary

Align the rtwopi and trigtab lookup table sections to 4-byte boundaries in the RP2350 Cortex-M33 assembly implementation.

The double_section macro selects executable sections but does not explicitly specify their alignment. With the ARM LLVM Embedded Toolchain, these sections were emitted with only 1-byte alignment.

This change adds .p2align 2 before both tables, ensuring 4-byte section alignment.

Verification

• Built pico_double_test_pico_dcp using ARM LLVM Embedded Toolchain 19.1.5.
• Inspected the generated object file using llvm-readelf.
• Before the change, both sections had alignment 1.
• After the change, both sections have alignment 4.
• git diff --check passes.

Hardware validation on RP2350 has not yet been performed.

Fixes #3183