Cleanup after non-Linux code removal.

Conditions such as defined(LINUX) are always true now,
defined(FREEBSD) etc are always false.
When if directive has them as subexpressions, it can be simplified.
Another trivial changes here are fixes for directive indentation.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/util.c b/util.c
index b7ba283..80acc13 100644
--- a/util.c
+++ b/util.c
@@ -44,27 +44,27 @@
 #include <sys/uio.h>
 #endif
 
-#if defined(linux) && (__GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 1))
+#if __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 1)
 #include <linux/ptrace.h>
 #endif
 
-#if defined(LINUX) && defined(IA64)
+#if defined(IA64)
 # include <asm/ptrace_offsets.h>
 # include <asm/rse.h>
 #endif
 
 #ifdef HAVE_SYS_REG_H
-#include <sys/reg.h>
+# include <sys/reg.h>
 # define PTRACE_PEEKUSR PTRACE_PEEKUSER
 #elif defined(HAVE_LINUX_PTRACE_H)
-#undef PTRACE_SYSCALL
+# undef PTRACE_SYSCALL
 # ifdef HAVE_STRUCT_IA64_FPREG
 #  define ia64_fpreg XXX_ia64_fpreg
 # endif
 # ifdef HAVE_STRUCT_PT_ALL_USER_REGS
 #  define pt_all_user_regs XXX_pt_all_user_regs
 # endif
-#include <linux/ptrace.h>
+# include <linux/ptrace.h>
 # undef ia64_fpreg
 # undef pt_all_user_regs
 #endif
@@ -246,7 +246,7 @@
 int
 printllval(struct tcb *tcp, const char *format, int llarg)
 {
-# if defined LINUX && (defined X86_64 || defined POWERPC64)
+# if defined X86_64 || defined POWERPC64
 	if (current_personality == 0) {
 		tprintf(format, tcp->u_arg[llarg]);
 		llarg++;
@@ -655,7 +655,7 @@
 void
 dumpiov(struct tcb *tcp, int len, long addr)
 {
-#if defined(LINUX) && SUPPORTED_PERSONALITIES > 1
+#if SUPPORTED_PERSONALITIES > 1
 	union {
 		struct { u_int32_t base; u_int32_t len; } *iov32;
 		struct { u_int64_t base; u_int64_t len; } *iov64;