soc: stm32: STM32L0: Remove useless package digit

Fixes #16733, applied to STM32L0 series.

Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>

soc/arm/st_stm32/stm32l0/Kconfig.defconfig.stm32l073xx

@@ -0,0 +1,31 @@
+# Kconfig - ST Microelectronics STM32L073XZ MCU
+#
+# Copyright (c) 2018 Ilya Tagunov <tagunil@gmail.com>
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+if SOC_STM32L073XX
+
+config SOC
+	string
+	default "stm32l073xx"
+
+config NUM_IRQS
+	int
+	default 32
+
+if GPIO_STM32
+
+config GPIO_STM32_PORTD
+	default y
+
+config GPIO_STM32_PORTE
+	default y
+
+config GPIO_STM32_PORTH
+	default y
+
+endif # GPIO_STM32
+
+endif # SOC_STM32L073XX