Flash test reads wrong value for status register 3

[PatrickKa]

Description

Andriy found that on COBC 3.0 and 2.7 the status register 3 is 0x40 instead of 0x41. Seems like we never noticed that fail until now, but it was always there. A look at the datasheet shows that the bit that makes the difference shows whether the chip is in 3- or 4-byte-address mode. When initializing the chip, we explicitly enter 4-byte-address mode, but since we read 0x40 instead of 0x41 for status register 3, it seems like this does not work. Upon more datasheet reading, I found out that we only use the explicit 4-byte-read/write/erase commands, which always expect a 4-byte address no matter which mode the chip is in. Therefore, the simple solution to the problem is to just remove Enter4ByteAddressMode() from flash::Initialize() and check if status register 3 is 0x40 instead of 0x41.