[SRU][Bionic][PATCH 1/3] s390/zcrypt: code beautify

[Frank Heimes]

From: Harald Freudenberger <freude at linux.ibm.com>

BugLink: http://bugs.launchpad.net/bugs/1799184

Code beautify by following most of the checkpatch suggestions:
 - SPDX license identifier line complains by checkpatch
 - missing space or newline complains by checkpatch
 - octal numbers for permssions complains by checkpatch
 - renaming of static sysfs functions complains by checkpatch
 - fix of block comment complains by checkpatch
 - fix printf like calls where function name instead of %s __func__
   was used
 - __packed instead of __attribute__((packed))
 - init to zero for static variables removed
 - use of DEVICE_ATTR_RO and DEVICE_ATTR_RW macros

No functional code changes or API changes!

Signed-off-by: Harald Freudenberger <freude at linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky at de.ibm.com>

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https://github.com/torvalds/linux/commit/ac2b96f351d7d222c46e524feca03005f3fa8d75
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