arch: arm: core: cortex_a_r: enable the VFP unit on boot for FPU_SHARING

The FPU is already disabled by the z_arm_svc function when the first
thread starts. Therefore, disabling the FPU at boot is unnecessary for
lazy FPU; instead, it must be enabled to handle floating-point instructions
before the lazy FPU works.

Signed-off-by: Ha Duong Quang <[email protected]>

Author: haduongquang

arch/arm/core/cortex_a_r/prep_c.c

@@ -62,7 +62,6 @@ static inline void z_arm_floating_point_init(void)
 	__set_CPACR(reg_val);
 	barrier_isync_fence_full();
 
-#if !defined(CONFIG_FPU_SHARING)
 	/*
 	 * FPEXC: Floating-Point Exception Control register
 	 * comp. ARM Architecture Reference Manual, ARMv7-A and ARMv7-R edition,
@@ -84,7 +83,6 @@ static inline void z_arm_floating_point_init(void)
 	 */
 	__set_FPEXC(FPEXC_EN);
 #endif
-#endif
 }
 
 #endif /* CONFIG_CPU_HAS_FPU */