main/alpine-ipxe-1.20.1-r1: Assembler messages: Error: operand size mismatch for `push'

main/alpine-ipxe fails to build on arch:x86:

arch/x86/image/bootsector.c: Assembler messages:
arch/x86/image/bootsector.c:85: Error: operand size mismatch for `push'

See:

• https://build.alpinelinux.org/buildlogs/build-3-19-x86_64/main/alpine-ipxe/alpine-ipxe-1.20.1-r1.log