Fix misunderstanding in description of cglobal function parameter

[jks-liu]

Fix misunderstanding in cglobal function parameter description.

[kierank]

Probably needs a comma before "including"

[pranjalpokharel7]

@kierank as I understand, the two GPRs in this context are the pointers to src and src2 (implicitly assigned), and if we use additional registers then it adds to the GPR count value. For fixing the misunderstanding, we could also add a comment as,

movu  m0, [srcq]     ; srcq is a GPR containing the address of src which is dereferenced