bsps/stm32h7: move cache implementation from obj to BSPs own yml file

This is done in preparation for future Cortex-M4 based BSP variants
which do not provide cache at all.

Sponsored-By:	Precidata

spec/build/bsps/arm/stm32h7/bspnucleoh743zi.yml

@@ -19,4 +19,5 @@ source:
 - bsps/arm/stm32h7/boards/stm/nucleo-h743zi/stm32h7-config-per.c
 - bsps/arm/stm32h7/boards/stm/nucleo-h743zi/system_stm32h7xx.c
 - bsps/arm/stm32h7/boards/stm/nucleo-h743zi/ext-mem-ctl.c
+- bsps/arm/shared/cache/cache-v7m.c
 type: build

spec/build/bsps/arm/stm32h7/bspstm32h7.yml

@@ -19,4 +19,5 @@ source:
 - bsps/arm/stm32h7/boards/stm/stm32h743i-eval/stm32h7-config-per.c
 - bsps/arm/stm32h7/boards/stm/stm32h743i-eval/system_stm32h7xx.c
 - bsps/arm/stm32h7/boards/stm/stm32h743i-eval/ext-mem-ctl.c
+- bsps/arm/shared/cache/cache-v7m.c
 type: build

spec/build/bsps/arm/stm32h7/bspstm32h757i-eval.yml

@@ -20,4 +20,5 @@ source:
 - bsps/arm/stm32h7/boards/stm/stm32h757i-eval/stm32h7-config-osc.c
 - bsps/arm/stm32h7/boards/stm/stm32h757i-eval/stm32h7-config-per.c
 - bsps/arm/stm32h7/boards/stm/stm32h757i-eval/system_stm32h7xx.c
+- bsps/arm/shared/cache/cache-v7m.c
 type: build

spec/build/bsps/arm/stm32h7/bspstm32h7b3i-dk.yml

@@ -21,4 +21,5 @@ source:
 - bsps/arm/stm32h7/boards/stm/stm32h7b3i-dk/stm32h7-config-per.c
 - bsps/arm/stm32h7/boards/stm/stm32h7b3i-dk/system_stm32h7xx.c
 - bsps/arm/stm32h7/boards/stm/stm32h7b3i-dk/ext-mem-ctl.c
+- bsps/arm/shared/cache/cache-v7m.c
 type: build

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

@@ -171,7 +171,6 @@ install:
   - bsps/arm/stm32h7/include/stm32h7/mpu-config.h
 links: []
 source:
-- bsps/arm/shared/cache/cache-v7m.c
 - bsps/arm/shared/clock/clock-armv7m.c
 - bsps/arm/shared/cpucounter/cpucounter-armv7m.c
 - bsps/arm/shared/irq/irq-armv7m.c