Modify the successive dtsi include to better reflect the underlying
structure of the F0 family.
There are two main subfamilies: STM32F0x0 on one side, and STM32F0x1, x2
and x8 on the other

Signed-off-by: Guillaume Gautier <guillaume.gautier-ext@st.com>

Remove USART2 from base dtsi, and add it to F030x8, F070 & F051

Signed-off-by: Guillaume Gautier <guillaume.gautier-ext@st.com>

Remove I2C2 from base dtsi, and add it to F030x8, F070xB & F051

Signed-off-by: Guillaume Gautier <guillaume.gautier-ext@st.com>

Remove TIM6, 7 & 15 from base dtsi, and add TIM6 & 15 to F030x8, TIM7 for
F030xC, TIM15 for F070, TIM6 & 7 for F070xC, TIM6 & 15 to F051, and TIM7
for F071.
Remove TIM2 from F072 and F091 dtsi since it is already included in F031.

Signed-off-by: Guillaume Gautier <guillaume.gautier-ext@st.com>

Fix DMA1 interrupt channels. There are 7 for STM32F071 and higher, and 5
for all others, default value for the series.

Signed-off-by: Guillaume Gautier <guillaume.gautier-ext@st.com>

Remove calibrated temperature measure from base dtsi since it does not
exist for STM32F0x0, and add it only for the other STM32F0.

Signed-off-by: Guillaume Gautier <guillaume.gautier-ext@st.com>

Flash erase-block-size is 2048 for F030xC, F070xB, and F071 and higher.
For all others, it is 1024, default value in base dtsi.

Signed-off-by: Guillaume Gautier <guillaume.gautier-ext@st.com>

Remove SPI2 from F070 (not present on F070x6) and add it to F070xB.
Add it to F051 and remove it from F091 (since it is already defined).

Signed-off-by: Guillaume Gautier <guillaume.gautier-ext@st.com>

RTC backup registers are already defined in F031, so no need to include
them again.

Signed-off-by: Guillaume Gautier <guillaume.gautier-ext@st.com>

Add HSI48 to F071, and remove it from F072 and F091.

Signed-off-by: Guillaume Gautier <guillaume.gautier-ext@st.com>

Add GPIOE to F071, and remove it from F072 and F091.

Signed-off-by: Guillaume Gautier <guillaume.gautier-ext@st.com>

Remove DAC1 from F072 and F091 since it alfready defined in F051.

Signed-off-by: Guillaume Gautier <guillaume.gautier-ext@st.com>

Add USB to STM32F072 dtsi.

Signed-off-by: Guillaume Gautier <guillaume.gautier-ext@st.com>

Add CAN1 to STM32F091 dtsi.

Signed-off-by: Guillaume Gautier <guillaume.gautier-ext@st.com>

Add some more USART for F070xB, F071 and F091.

Signed-off-by: Guillaume Gautier <guillaume.gautier-ext@st.com>

Add a dtsi for STM32F042 for the support of Nucleo F042K6

Signed-off-by: Guillaume Gautier <guillaume.gautier-ext@st.com>

Add Kconfig for STMF042x6 to support the Nucleo F042K6.

Signed-off-by: Guillaume Gautier <guillaume.gautier-ext@st.com>

Add support for Nucleo F042K6

Signed-off-by: Guillaume Gautier <guillaume.gautier-ext@st.com>