dts: bindings: st,stm32h7-spi: add mssi and midi property

add Master Inter-Data Idleness and
Master SS Idleness field. That fields
are integers.

Signed-off-by: Mustafa Abdullah Kus <[email protected]>

Author: mustafaabdullahk

dts/bindings/spi/st,stm32h7-spi.yaml

@@ -12,3 +12,18 @@ description: |
 compatible: "st,stm32h7-spi"
 
 include: st,stm32-spi-common.yaml
+
+properties:
+  midi-clock:
+    type: int
+    default: 0
+    description: |
+      (Master Inter-Data Idleness) minimum clock inserted
+      between two consecutive data frames.
+
+  mssi-clock:
+    type: int
+    default: 0
+    description: |
+      (Master SS Idleness) minimum clock inserted between
+      start and first data transaction.