gc_simple_spi_master: keep MOSI at 0 when inactive so that multi-master SPI signals can be just ORed together

gc_sync_ffs: revert commit d2b71b65. It breaks the timestamper unit in wr_endpoint!

wb_fine_pulse_gen: implement separate serdes/PLL reset and lock indicator (required to maintain correct phase of the output pulses)

This generic is dummy (does nothing), yet it is needed since the
generic component declaration in genram_pkg.vhd has such generic.
It has it, because the xilinx generic_dpram.vhd has such generic
and uses it.
TBD whether we want to attempt at providing similar functionality
for altera

wb_fine_pulse_gen: implement separate serdes/PLL reset and lock indicator (required to maintain correct phase of the output pulses)

Reported by Olof Kindgren (@olofk). See also merge request !4.
Signed-off-by: Dimitris Lampridis <dimitris.lampridis@cern.ch>

1.0.4 - 2020-03-26
==================
https://www.ohwr.org/project/general-cores/tags/v1.0.4

Added
-----
- [hdl] VHDL functions to convert characters and strings to upper/lower case.
- [sw][i2c] Support for kernel greater than 4.7.
- [hdl] Separate synchroniser and edge detection modules.
- [hdl] 8b10b encoder.

Changed
-------
- [hdl] Rewritten the WB master interface used in simulations.
- [hdl] Reimplement gc_sync_ffs using new synchroniser and edge detectors.

Fixed
-----
- [sw][spi] Align polarity and phase for Rx and Tx.
- [hdl][i2c] Fix reset lock for I2C master.
- [hdl] Avoid cyclic dependencies for log2 ceiling functions.

Signed-off-by: Dimitris Lampridis <dimitris.lampridis@cern.ch>

Using the guidelines from here:
https://gitlab.cern.ch/be-co-ht-documents/project-management-guidelines/-/blob/master/how-to-write-changelog.rstSigned-off-by: Dimitris Lampridis <dimitris.lampridis@cern.ch>

Instead of check for version here and there, the main code always uses
the latest API, and in a preprocessor ``if`` statement I implemented
the compatibility layer.

Like this it will be easier to apply patches from the kernel to our
local driver
Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

sw:  Update spi-ocores

See merge request !3

Signed-off-by: Dimitris Lampridis <dimitris.lampridis@cern.ch>

Signed-off-by: Dimitris Lampridis <dimitris.lampridis@cern.ch>

Also perform cleanup of sync and edge modules.
Signed-off-by: Dimitris Lampridis <dimitris.lampridis@cern.ch>

Signed-off-by: Dimitris Lampridis <dimitris.lampridis@cern.ch>

Signed-off-by: Dimitris Lampridis <dimitris.lampridis@cern.ch>