refactor(hw_crc32): renamed hw_crc32 to tf_crc32

Renamed hw_crc32 to tf_crc32 to make the file and function
name more generic so that the same name can be used in upcoming
software CRC32 implementation.

Change-Id: Idff8f70c50ca700a4328a27b49d5e1f14d2095eb
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
diff --git a/plat/arm/common/arm_common.mk b/plat/arm/common/arm_common.mk
index 262174f..4d5e8b4 100644
--- a/plat/arm/common/arm_common.mk
+++ b/plat/arm/common/arm_common.mk
@@ -242,7 +242,7 @@
 				drivers/io/io_storage.c				\
 				plat/arm/common/arm_bl2_setup.c			\
 				plat/arm/common/arm_err.c			\
-				common/hw_crc32.c				\
+				common/tf_crc32.c				\
 				${ARM_IO_SOURCES}
 
 # Firmware Configuration Framework sources