Fix parsing of logic synthesis reports

Created by: vloncar

Description

Due to changes in the format of the Vivado (logic) synthesis, the parsing function is broken and zeros are returned. This fix ensures only the appropriate sections are parsed.

Type of change

• Bug fix (non-breaking change that fixes an issue)

Tests

report = hls4ml.report.parse_vivado_report('/path/to/my/hls/outout/dir')
print(report['VivadoSynthReport'])

Observe before and after.