sysdeps/managarm: better `EVIO*` ioctl handling #4152

Job	Run time
Compile sysdeps (dripos)	2m 22s
Compile sysdeps (lemon)	2m 45s
Compile sysdeps (aero)	2m 49s
Build mlibc (x86_64, mlibc, gcc)	4m 11s
Compile sysdeps (ironclad)	2m 28s
Build mlibc (x86_64, mlibc-static, gcc)	3m 10s
Compile sysdeps (lyre)	2m 22s
Compile sysdeps (keyronex)	2m 25s
Build mlibc (x86_64, mlibc-shared, gcc)	3m 15s
Compile sysdeps (managarm)	3m 2s
Compile sysdeps (vinix)	2m 20s
Build mlibc (x86_64, mlibc-ansi-only, gcc)	2m 51s
Compile sysdeps (astral)	2m 27s
Build mlibc (x86_64, mlibc-headers-only, gcc)	2m 1s
Build mlibc (riscv64, mlibc, gcc)	3m 54s
Build mlibc (riscv64, mlibc-static, gcc)	4m 29s
Build mlibc (riscv64, mlibc-shared, gcc)	3m 4s
Build mlibc (riscv64, mlibc-ansi-only, gcc)	2m 45s
Build mlibc (riscv64, mlibc-headers-only, gcc)	1m 57s
Build mlibc (aarch64, mlibc, gcc)	4m 7s
Build mlibc (aarch64, mlibc-static, gcc)	3m 23s
Build mlibc (aarch64, mlibc-shared, gcc)	3m 36s
Build mlibc (aarch64, mlibc-ansi-only, gcc)	3m 11s
Build mlibc (aarch64, mlibc-headers-only, gcc)	2m 6s
Build mlibc (x86, mlibc, gcc)	3m 56s
Build mlibc (x86, mlibc-static, gcc)	3m 22s
Build mlibc (x86, mlibc-shared, gcc)	3m 12s
Build mlibc (x86, mlibc-ansi-only, gcc)	3m 6s
Build mlibc (x86, mlibc-headers-only, gcc)	2m 28s
Build mlibc (m68k, mlibc, gcc)	3m 30s
Build mlibc (m68k, mlibc-static, gcc)	2m 56s
Build mlibc (m68k, mlibc-shared, gcc)	2m 54s
Build mlibc (m68k, mlibc-ansi-only, gcc)	2m 46s
Build mlibc (m68k, mlibc-headers-only, gcc)	2m 0s
Build mlibc (x86_64, mlibc, clang)	4m 14s
	1h 45m 24s

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