[FS#1283] block info returns additional charactes in FAT32 label name

[LEDE Bugs]

The following task has a new comment added:

FS#1283 - block info returns additional charactes in FAT32 label name
User who did this - Jo-Philipp Wich (jow-)

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Hm I guess that other implemenations right-trim the spaces from the label for convenience reasons. I do recall that FAT labels are sometimes displayed as "foo" and sometimes as "foo        " by various tools and operating systems.

For maximal compatibility we likely should trim both user provided and blkid provided fat labels before working with them.
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=1283#comment4287