Fix last-address calculate error in norflash_erase

[CosmicRoach]

Summary

• Fix issue: norflash erase last address calculation error #179 (comment)

ToDos

• I only fixed 3 norflash-related code issues, and there are probably similar bugs somewhere.

[abrodkin]

Assigned to @xxkent for review.

[xxkent]

Looks good to me, in case of caller set sz > 0.

[CosmicRoach]

Checking the input parameters (address and size) is another matter, here we should make sure that address>=0 and size>0;

Assuming a correct parameter input, if we do not subtract 1 when calculating the last address of the erase, it will cause us to erase one more sector when the size of the erase is exactly one or more sectors-size.

Examples of errors:
When address=0x0, size=4096, dev->sector_sz=4096, this means that the user wants to erase the first sector,
So, last_address = (address + size) & (~(dev-> sector_sz-1))=4096; however, because of the loop condition while (address <= last_address); We enter two loops, causing the second sector to be erased by mistake.