Ilya Bakulin 02c474b481 Miscellaneous fixes and improvements to MMCCAM stack
* Demote the level of several debug messages to CAM_DEBUG_TRACE
 * Add detection for SDHC cards that can do 1.8V. No voltage switch sequence
   is issued yet;
 * Don't create a separate LUN for each SDIO function. We need just one to make
   pass(4) attach;
 * Remove obsolete mmc_sdio* files. SDIO functionality will be moved into the
   separate device that will manage a new sdio(4) bus;
 * Terminate probing if got no reply to CMD0;
 * Make bcm2835 SDHCI host controller driver compile with 'option MMCCAM'.

Approved by:	imp (mentor)
Differential Revision:	https://reviews.freebsd.org/D12109
2017-09-15 19:47:44 +00:00
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