Fix alignment of PC in ADR and LDR instructions #1
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Per the ARMv6-M Architecture Reference Manual section A5.1.2, when using the PC register as an address offset, it must be word aligned after adding 4 (which is equal to adding 4 and setting the lower 2 bits to 0).
P.S. Thanks for creating this project! It has been a godsend for bare-metal rp2040 development :)