• Adds macros for the content of SDHCI_ADMA_ERR and SDHCI_HOST_CONTROL2 registers.
• Add slot type capability bits. These bits should allow recognizing removable card slots, embedded cards and shared buses (shared bus supposedly is always comprised of non-removable cards).
• Dump CAPABILITIES2, ADMA_ERR, HOST_CONTROL2 and ADMA_ADDRESS_LO registers in sdhci_dumpregs().
• The drive type support flags in the CAPABILITIES2 register are for drive types A,C,D, drive type B is the default setting (value 0) of the drive strength field in the SDHCI_HOST_CONTROL2 register.

Obtained from: DragonFlyBSD (9e3c8f63, 455bd1b1)