bsps/stm32h7: Make UART7 pins configurable

This change allows for the pins assigned to UART7 to be reconfigured via
config.ini.

spec/build/bsps/arm/stm32h7/grp.yml

@@ -106,6 +106,10 @@ links:
   uid: optusart3gpiopins
 - role: build-dependency
   uid: optusart3gpioregs
+- role: build-dependency
+  uid: optuart7gpiopins
+- role: build-dependency
+  uid: optuart7gpioregs
 - role: build-dependency
   uid: optvariant
 - role: build-dependency

spec/build/bsps/arm/stm32h7/optuart7gpiopins.yml

@@ -0,0 +1,17 @@
+SPDX-License-Identifier: CC-BY-SA-4.0 OR BSD-2-Clause
+actions:
+- get-string: null
+- define-unquoted: null
+build-type: option
+copyrights:
+- Copyright (C) 2023 On-Line Applications Research (OAR)
+default:
+- enabled-by: true
+  value: ( GPIO_PIN_3 | GPIO_PIN_4 )
+description: |
+  GPIO pins used for the UART7 pin configuration.
+enabled-by: true
+format: '{}'
+links: []
+name: STM32H7_UART7_GPIO_PINS
+type: build

spec/build/bsps/arm/stm32h7/optuart7gpioregs.yml

@@ -0,0 +1,17 @@
+SPDX-License-Identifier: CC-BY-SA-4.0 OR BSD-2-Clause
+actions:
+- get-string: null
+- define-unquoted: null
+build-type: option
+copyrights:
+- Copyright (C) 2023 On-Line Applications Research (OAR)
+default:
+- enabled-by: true
+  value: GPIOB
+description: |
+  GPIO registers used for the UART7 pin configuration.
+enabled-by: true
+format: '{}'
+links: []
+name: STM32H7_UART7_GPIO_REGS
+type: build