A regular update of Leap 15.0 kernel.
Mostly for addressing the regression of TTY stuff.

- scsi: zfcp: fix posting too many status read buffers leading
to adapter shutdown (bsc#1121483, LTC#174588).
- commit b8f1228

- dasd: fix deadlock in dasd_times_out (bsc#1121477, LTC#174111).
- s390/dasd: simplify locking in dasd_times_out
(bsc#1104967,FATE#325924).
- commit 7519d69

- s390/qeth: fix length check in SNMP processing (bsc#1117953,
LTC#173657).
- s390/qeth: sanitize strings in debug messages (bsc#1117953,
LTC#172960).
- s390/kdump: Make elfcorehdr size calculation ABI compliant
(bsc#1117953, LTC#171112).
- s390/kdump: Fix elfcorehdr size calculation (bsc#1117953,
LTC#171112).
- s390/qeth: remove outdated portname debug msg (bsc#1117953,
LTC#172960).
- commit f50b84f

- Input: add official Raspberry Pi's touchscreen driver
(FATE#326921).
- Update config files.
- supported.conf: add raspberrypi-ts driver
- commit 1d3c066

- soc: bcm2835: sync firmware properties with downstream (FATE#326921)
- Refresh patches.drivers/ARM-bcm2835-Add-GET_THROTTLED-firmware-property.patch
- commit f7dfb08