cd85acba1a
"br" or "bridge" where - according to the terminology outlined in comments of bridge.h and mmcbr_if.m around since their addition in r163516 - the bus is meant and used instead. Some of these instances are also rather old, while those in e. g. mmc_subr.c are as new as r315430 and were caused by choosing mmc_wait_for_request(), i. e. the one pre-r315430 outliner existing in mmc.c, as template for function parameters in mmc_subr.c inadvertently. This correction translates to renaming "brdev" to "busdev" and "mmcbr" to "mmcbus" respectively as appropriate. While at it, also rename "reqdev" to just "dev" in mmc_subr.[c,h] for consistency with was already used in mmm.c pre-r315430, again modulo mmc_wait_for_request() that is. - Remove comment lines from bridge.h incorrectly suggesting that there would be a MMC bridge base class driver. - Update comments in bridge.h regarding the star topology of SD and SDIO; since version 3.00 of the SDHCI specification, for eSD and eSDIO bus topologies are actually possible in form of so called "shared buses" (in some subcontext later on renamed to "embedded" buses).
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