std.os.linux: Unbreak the build

Happened because I wrote #20869 before #20870.

Author: alexrp

lib/std/os/linux.zig

@@ -111,7 +111,7 @@ pub const SYS = switch (@import("builtin").cpu.arch) {
     .hexagon => syscalls.Hexagon,
     .riscv32 => syscalls.RiscV32,
     .riscv64 => syscalls.RiscV64,
-    .sparc, .sparcel => syscalls.Sparc,
+    .sparc => syscalls.Sparc,
     .sparc64 => syscalls.Sparc64,
     .m68k => syscalls.M68k,
     .mips, .mipsel => syscalls.MipsO32,