PSOC6.py: generate hex files with 16 bytes per row

DAPLink implementation on Cypress kits cannot handle hex files
with 64 bytes per row: refer to https://github.com/ARMmbed/DAPLink,
source/daplink/drag-n-drop/intelhex.c, hex_line_t struct, data field.

Author: vmedcy

tools/targets/PSOC6.py

@@ -91,7 +91,7 @@ def complete_func(message_func, elf0, hexf0, hexf1=None, dest=None):
     message_func("Postprocessing %s -> %s" % (elf0, hexf0))
     ihex = merge_images(hexf0, hexf1)
     patch(message_func, ihex, hexf0)
-    ihex.write_hex_file(dest if dest else hexf0, write_start_addr=False, byte_count=64)
+    ihex.write_hex_file(dest if dest else hexf0, write_start_addr=False, byte_count=16)
 
 # Find Cortex M0 image.
 def find_cm0_image(toolchain, resources, elf, hexf):