board: nucleo-l152re: Added registering logic I2C on /dev.
squash 5 commits
board: nucleo-l152re: Add missing I2C1 GPIO definition
I2C1 not worked due to it's GPIO pin definition has been missing on board.h.
Fix it through include two pin macros on stm32l15xxx_pinmap.h(arch/arm/src/stm32/hardware) to board.h
GPIO_I2C1_SCL => PB8 (CN5 pin 10, D15)
GPIO_I2C1_SDA => PB9 (CN5 pin 9, D14)
Added board_late_initialize() function for init I2C.
board: nucleo-l152re: Added registering logic I2C on /dev.
I2C1 hasn't been registered on /dev. Fix it.
board: nucleo-l152re: Fix code style.
Update board.h
board: nucleo-l152re: Fix code style.
Variables starting with symbol '"g_*" means it is a global variable, I think this is not the case here.
Fix code style
f731763211