It's unnecessary to count the present sections for the specified
block since the block will be added if any section in the block
is present. Besides, for_each_present_section_nr() can be reused
as Andrew Morton suggested.
Improve by using for_each_present_section_nr() and dropping the
unnecessary @section_count.
No functional changes intended.
Signed-off-by: Gavin Shan <gshan@xxxxxxxxxx>
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