some style/layout changes

Just do a few simple style/layout changes to make the makefile look
better.

Signed-off-by: Andreas Philipp <philipp.andreas@gmail.com>
Signed-off-by: Hugo Mills <hugo@carfax.org.uk>

Makefile

@@ -1,4 +1,4 @@
-CC=gcc
+CC = gcc
 AM_CFLAGS = -Wall -D_FILE_OFFSET_BITS=64 -D_FORTIFY_SOURCE=2
 CFLAGS = -g -Werror -Os
 objects = ctree.o disk-io.o radix-tree.o extent-tree.o print-tree.o \
@@ -6,25 +6,23 @@ objects = ctree.o disk-io.o radix-tree.o extent-tree.o print-tree.o \
 	  inode-map.o crc32c.o rbtree.o extent-cache.o extent_io.o \
 	  volumes.o utils.o btrfs-list.o btrfslabel.o
 
-#
-CHECKFLAGS=-D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise \
-		-Wuninitialized -Wshadow -Wundef
+CHECKFLAGS= -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise \
+	    -Wuninitialized -Wshadow -Wundef
 DEPFLAGS = -Wp,-MMD,$(@D)/.$(@F).d,-MT,$@
 
-INSTALL= install
+INSTALL = install
 prefix ?= /usr/local
 bindir = $(prefix)/bin
-LIBS=-luuid
+LIBS = -luuid
 
 progs = btrfsctl mkfs.btrfs btrfs-debug-tree btrfs-show btrfs-vol btrfsck \
-	btrfs \
-	btrfs-map-logical
+	btrfs btrfs-map-logical
 
 # make C=1 to enable sparse
 ifdef C
-	check=sparse $(CHECKFLAGS)
+	check = sparse $(CHECKFLAGS)
 else
-	check=ls
+	check = ls
 endif
 
 .c.o: