Fix defined(FOO) style

* file.c: Consistently use defined(FOO) instead of defined (FOO).
* mem.c: Likewise.
* net.c: Likewise.
* signal.c: Likewise.
* sock.c: Likewise.
* linux/mips/syscallent.h: Likewise.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/signal.c b/signal.c
index eab5c52..89a44ff 100644
--- a/signal.c
+++ b/signal.c
@@ -1010,7 +1010,7 @@
 		tprints(sprintsigmask(") (mask ", &sigm, 0));
 	}
 	return 0;
-#elif defined (SPARC) || defined (SPARC64)
+#elif defined(SPARC) || defined(SPARC64)
 	if (entering(tcp)) {
 		long i1;
 		struct pt_regs regs;
@@ -1029,7 +1029,7 @@
 		tprints(sprintsigmask(") (mask ", &sigm, 0));
 	}
 	return 0;
-#elif defined (LINUX_MIPSN32) || defined (LINUX_MIPSN64)
+#elif defined(LINUX_MIPSN32) || defined(LINUX_MIPSN64)
 	/* This decodes rt_sigreturn.  The 64-bit ABIs do not have
 	   sigreturn.  */
 	if (entering(tcp)) {